"Ms. Octavia! Curtains will go up in five minutes!"

"...Right. Thank you. I'm just about prepared to go on," Octavia said with a confident smile on her face.

The world-famous cellist rose to her feet. She was dressed in an elegant,white tuxedo shirt, a pink bowtie, and sleek black dress pants with matching black dress shoes. She strode to her prized cello, which was shining ever so softly in the backstage light.

Her softball-sized breasts jiggled with each step she took. Her ears flickered at the sound of whispers—excited, by the sound of them—coming from the staff backstage. A soft smile drifted onto her face. She placed one hand on her hip, standing tall with her solid five foot, seven inch frame. She grasped her beloved cello in one hand and looked towards the nearby dressing room table where her brand-new bow was laying in wait.

She giggled. "At last, I finally get to use this elegant piece of craftsmanship." A couple of steps later, and she found herself near the table. She then took the bow out of its case and examined it carefully.

The bow was well-coated in black lacquer which absorbed all light that struck it, making its color stick out in most environments. It felt smooth and sturdy in her hand while it also gave her a warm feeling against her palm upon holding it. The bowstring didn’t have a single loose hair or lint on it, a sure reflection of its high quality! Seeing the sheer beauty of her new bow filled her with newfound confidence.

Her eyes narrowed. There was a gold inscription on the interior wall of the bow. Right as she was about to read it, though, the stage coordinator interrupted her.

"Showtime, Ms. Octavia! Have a splendid concert," he said.

"Thank you. I shall do my best,” Octavia replied. She then made her way to the stage with her chin held up high, eager to show the world the fruits of her strenuous practicing. She strutted forward, each step bouncing her perky bosom, her firm hips swaying from side to side. However, her heart was pounding within her chest, causing her to take shallow breaths.

She lowered her head and took a deep breath.

“Okay Tavi...relax. This is just another concert. You can do this,” she muttered. She stepped onto stage and faced the tall curtains, waiting for the show to finally begin.

The red curtains rose high into the air. A wave of energetic applause shook her body from head to toe, yet her eyes remained open and focused. The once-spacious concert hall was filled to the brim with ponies of all ages. The audience even filled up the balcony level, which rarely sold out. She could feel the stare of thousands of eyes on her body, her heart rate speeding up the more she wondered about that fact.

She soon made her way to the music stand and chair, all with a calm look on her face. She took a standard, quick bow before taking her seat. Her left leg made its way around the base of the cello for support and sat up straight. Her left hand grasped the long neck of the cello and her right hand held the bow toward the ground.

In front of her large, purple eyes was a famous, three movement piece composed by the great Beethoofen titled "Symphony No. 34". The crowd then grew silent as she closed her eyes and lifted her brand new bow for all to see. As soon as the bow contacted the strings of the cello, a sharp jolt of magical energy shocked her hand!

She grunted in pain. A nervous grin formed as she felt that strange, sudden sensation. She clenched her right hand, gritting her teeth as she tried to shake off the pain. She took a deep breath. Her fingers moved back into position, her grip tightening around the bow. Now composed, she begun the first movement of her piece.

Resonant, low notes filled the spacious concert hall. The pitch, the melody, the tone, it was all perfection. She felt it, and so did the audience as they were entranced by her playing. Every note, every measure, flowed from one to another, creating a musical experience no other pony in Equestria could hope to recreate.

However, unknowingly to her mind, her own music was starting to cause some unnatural change in her body. Each note she played sent a familiar tingle down her spine. She closed her eyes to relish in these small sensations. Thoughts of her body pulsating with the music came to her mind.

Her beating heart slowed down to match the tempo of the music. She felt those beats through her breasts, which caused a small blush to appear on her face as she felt more in tune with her performance. Thoughts of freedom also filled her mind, drawing unwanted attention to her clothes. Her smile faded away thinking about those constricting clothes of hers, yet her desire grew to be one with her music.

As the performance went on, the bow glowed softly and her bust started to expand. Bigger did it get, with each measure adding a couple of inches to her bust size. The firm flesh pressed against her white concert shirt and started to stretch it, sending slight ripples of pleasure to her mind. Soothing, cool breaths left her body with each ripple she felt.
Her hips begun to swell too. They strained against the fabric of her sleek-black pants. Luckily, the dull sounds from the stretching fabric was covered up by the sounds of the cello.

Her flank filled up with layers of fat and muscle, pushing her off her seat and filling her entire lower body with a warm, inviting feelings. The chair creaked beneath her growing flank, but she simply shifted her weight and continued her performance. She couldn’t help but smile and move her upper body, emphasizing each smooth stroke of her bow. She was playing Beethoven’s work after all, one of her favorite classical composers of all time.

The bow continued to dance across the cello, with her growing a few more inches with each pull. Her entire body expanded in time with her soft, controlled breathing, pushing against all of the remaining wrinkles in her clothing. The tiny pulses of pleasure were now tickling her at nearly every point of her body. Her body seemed to sing with the music—her legs twitched, vibrating with a high C, and she felt a surge of warmth in her chest as her next G sang out across the stage.

Toward the end of the first movement, she had grown a couple of bust sizes and was now carrying melon-sized breasts. They bulged through her shirt and moved up and down with her breathing. She felt a heavier, downward pull on her chest that made her groan in approval.

Her hips and thighs expanded until her pants look almost painted on. She was now around six feet, seven inches tall, a full foot taller than normal. her ears wiggled a bit at the whispers from the crowd, but once again, she continued to ignore such rude distractions and focused on her performance.

She then finished the first movement and the audience gave her a resounding applause. She took a deep breath to psych herself up for the next movement. However, since her clothes now felt so tight on her, she opened her eyes to examine herself. Whereas before she could see the entire sheet of music in front of her, her enlarged chest managed to cover up half of the sheet. The outline of her straining bra also left a very deep impression on her shirt.

She then tried to shift her weight to compose herself, but she felt both of her legs and flank struggling to move. The tightness from her pants made her rather uncomfortable, and any sudden movements caused some the pants’ fabric to tear.
Her eyes widened. She took a quick glance at her black bow, which was glowing softly with magical energy. She giggled. She rubbed the bow in her hands for a bit, feeling the small sparks tickle her fingers. She moaned at the energy she felt, but then set her gaze back to the music.

She lifted her bow up once more and she begun the second movement. The music was lot more soothing and enchanting than before, as expected from a standard three movement classical piece of music. Still, the changes continued to intensify all around her body.

Her bust was now expanding at a faster rate. Her large, purple nipples were getting harder as they erected and formed a noticeable outline on the edge of her shirt. The increased pressure from both the force of the restraining shirt and the increasing volume of milk and fat within her breasts sent greater waves of pleasure through her body. She could not help but moan quietly to herself as a faint blush appeared on her face.

Her pants started to tear apart as her hips and thighs continued to expand. Although those sounds continued to be covered up by the music, the rips got to a point where her smooth, gray flesh was exposed. She heard some more gasps from the audience, but that didn't faze her performance at all.

She grew again, panting with each shock of magic she felt against her skin. Her eyelids pressed more tightly together, moaning as she felt her legs swell against her pants. Ears twitching with each new measure, she tightened her grip on the bow. Each note came easier than the last, her right foot tapping—and growing—alongside the tempo.

Halfway through the movement, she passed seven feet in height, at which point one of her shirt buttons popped off her shirt. As she hit eight feet -- another button popped off --flying further than before. And this continued for every half foot she grew, until all of her buttons came off and her own shirt started to tear down the center.

Throughout her entire growth spurt, she started to let loose louder moans. She felt her marehood feel damper by the second. She could not help but squeeze her thick legs together to embrace the wetness, which caused a couple more rips in her pants.

The sweet smell of her love juices reached her nostrils, which just made her blush even harder and breathe more rapidly as she get more turned on. The chair she sat on started to creak and bend under the increasing, now plump rump of hers. Both the cushion and metal supports dug into her flank. She bit her lip as that pressure felt so invigorating for her.

The glow around the bow grew brighter as she continued to slide her rump further into the chair. She pressed the bow tighter against the strings, ignoring dynamics as the notes got louder. Her controlled breathing became short, desperate gasps as her face flushed three shades of red deeper. Even sweat drops formed on her forehead and rolled down her cheeks. Still, she showed no signs of slowing down.

Instead, she gasped and twitched she hit the climax of the second movement! A sharp rip could be heard as both her shirt, pants, and dress shoes fell off her amazonian-like body to the stage floor. She heard the loudest gasp and whispers yet from the audience.

There, in the bright lights of the stage, stood a 12 foot, hyper-curvaceous pony. She was sporting beach ball-sized tits that nearly reached the bottom of her stomach. Her eyes were closed. Her cheeks blushed a shade deeper of red from the growing sensations she just felt.

Now in only her pink underwear, with both her bra and panties struggling to hold in the growing body they contained, she sighed in relief. With her pulsating, erect nipples and her exposed cameltoe, no longer did her concert clothes restrict her pleasure.

She opened her eyes and looked towards the crowd, whispering and giggling to themselves. Obnoxious wolf whistles rang through the air before security escorted them out for disruption of the concert. She widened her eyes, covering her mouth to hide some of her beet-red face.

Her mountainous chest had by now completely obscured her view of the music stand. Though she knew it was futile, she used her free arm to cover her cleavage, pushing down against the two mounds of flesh hanging from her body. She held her thick legs against one another, struggling to contain her arousal as beads of sweat poured down her face.

She turned her head over to her manager, who was covering his eyes with his clipboard and made a "continue" gesture with his hand. Octavia then looked at her magical bow, which had grown with her and the cello.

She turned her head back to face the audience. She sighed and lowered her head. The frantic whispers continued to annoy her ears, yet her raging blush soon began to fade. Her sweaty hands gripped tighter on the neck of the cello and the bow. Soft, peaceful breaths returned as she lifted her bow in the air, silencing the crowd.

She closed her eyes once more and begun the final movement. Suddenly, a flurry of pitch perfect cello notes silenced the crowd and entranced them. Crazy arpeggios and complex rhythms soon filled the concert hall. She closed her eyes as she played, biting her lip as the pleasures of growth continued to consume her mind.

The growth effects were near instantaneous this time around. First, her already curvy lower body swelled larger. Her thick thighs became perfectly toned with layers of strong, lean muscle while her foal-bearing hips were getting wider than her shoulders, and her round flank was filling up with more and more of her soft, gray flesh.

Each square inch of extra mass felt like a finger stroke to her marehood, her moans steadily increasing in intensity. The wetness returned to her loins, soaking them quicker than before. Her massive thighs twitched from her femcum. She couldn’t help but start panting with these stronger sensations.

Her twelve foot frame shuddered and grew to newfound heights. With a resounding crack, the chair finally gave way to the weight and buckled, sending it flying to the backstage wall behind her. The staff were likely in a panic, she thought with a chuckle.. Yet, that mattered little to her as she was fully immersed in her own performance.

Her rump hit the wood floor, shaking the whole stage and knocking her music stand over. Notes continued to fill the air as the bow continued to dance around the strings. The stage continued to shake under her growing weight in her attempts to stand up. Once on her two feet, she gripped the bow even harder, driving each set of notes louder with each broad stroke.
The bow glew its brightest yet. She held her eyelids shut tight, smiling as the orgasmic feelings of growth entered her mind. Upwards she grew, gaining inches at a rate of ten inches per thirty seconds. The underwear stretched thinner and thinner as it fought against the growth, squeaking out more deep moans from her.

Around the fifteen foot mark, her underwear tore apart and launched far into the audience.

"YES! I got it,” said a lucky stallion. He sniffed his prize, erecting his wings and blushing from his sudden arousal.

He was then escorted out by security with a pair of moist, flimsy panties in his hands. Meanwhile, Octavia’s bra landed in the possession of a security guard, who quickly stuffed it inside his pants with a gleeful expression on his face. Octavia giggled and smirked.

Now free from their clothing confines, her massive breasts sagged a bit and swung along to the music for all to see. Concert etiquette was being thrown out the window as some more horny audience members cheered at the sight of the growing cellist. Even the security guards decided that enough was enough and joined in the cheering.

She soon reached a towering height of twenty five feet towards the middle of this movement. Squeals of joy left her lips, her sensitive, purple nipples becoming even harder as she grew. She decided to place on of her huge teats behind the body of the cello,letting the low, vibrant sound waves it produced rumbled her exposed tit. Her head reeled back quickly, embracing the intoxicating pulses of pleasure.

Her sex was super-soaked at this point, femcum dripping on the stage. Members of the audience didn't dare move an inch as they were frozen in place by the hypnotizing music and her sexy, naked body.

Love juices flowed down the sides of her massive legs, her entire body twitching in pleasure. Thoughts of the current performance faded into the kinkiest things that she wanted to have happen to her. She chuckled as her female instincts kicked, lightly humping the air.

She could not hold in her pleasure any longer as she just moaned louder and louder with each foot she grew. Her breasts continued to swell with creamy milk and fat. A familiar pressure began to build up in her teats, causing her nipples to fully erect and throb with desire. She yelped with each pulse of her nipples and arched back, squeezing her tits together.

The pressure finally was released as her nipples splurged out delicious, warm milk. The milk fell on the front rows of the audience. Her ears twitched as she heard the crescendoing cheers from her horny fans.

Her hips have gotten to the size where they knocked over unused stage props and lights. She continued to imagine the backstage crew’s frenzy, bringing a smile to her face. Each little thing she touched with her growing body amplified her feelings of pleasure, fueling her desire to grow larger!

The music then reached its climax, cuing her most intense growth spurt yet! She instantly grew to thirty eight feet while her bust continue to expand and lactate. Her breasts weren't just splurging out blobs of milk anymore. The milk was now shooting out in streams through the gigantic-purple nipples, getting the audience members soaked with it. Her eyes shut tighter than ever and she could not close her mouth to suppress the moans of lust. “Yes! More… more!"

She continued to surge in height as her pony ears grazed the ceiling of the concert hall. She was overwhelmed with pleasure, wanting to relieve her built up sensations by doing the unthinkable during a concert. She temporarily stopped playing to lift one of her massive tits to her mouth and started to suck it.

She felt the warm streams of milk enter her mouth, tasting even better than she thought it would. Her eyes were half open as she found herself lost in her bliss, sucking like a satisfied foal with a bottle in her mouth. Every couple of seconds, she would shove a bit more of her breast in her mouth, letting her tongue worship the gushing nipple.

The milk was coming out so fast that some dripped out the sides of her mouth, running down her face and continuing to excite her titanic body. The breasts continue to increase in size despite the large amount of milk leaving them.
Still, she continued to play her music as she grew. Meanwhile, the stage itself continued to stretch and crack under the growing mare. When her head started to push against the ceiling, the stage finally broke underneath the immense weight.

"Ah! Everypony for themselves!" Both the audience and security staff started to frantically escape the concert hall. In her mind though, she didn't care. All she wanted right now was to get bigger.

So she just continued to grow and grow and grow! Her mane now brushed against the ceiling. Her head soon followed and started to push against the ceiling once more. She held her cello closer to her body, grinning as her nipples rubbed once more against the cello. She grunted and moved around, trying to maintain her playing position. But everything she did sent shockwaves of pleasure down her spine.

“Almost... there! Bigger. I… must be bigger!” Octavia yelled at the top of her lungs, lost in her lust. The entire concert hall started to crumble and break apart, trying it's best to contain the newly grown giantess it held. With one, deep grunt from her mouth, the concert hall gave way as she yelled in ecstasy!

Boom! Up soared her body, growing for everyone in Canterlot to see. Her back arched backwards as waves upon waves of magical energy pulsed through her entire body. She was almost hyperventilating at this point trying to ride out her orgasm! She humped away at her giant cello in a desperate attempt to feel some resistance against her gushing marehood.

"Y-yes! Oh Celestia... p-please don't let this stooooop!!!"

It was truly the best sensation she felt in the world. She continued to squeal and grope herself as she continued to ride out her latest growth spurt. Her femcum ran like a small river towards the floor while her humongous breasts gushed milk like a small waterfall.

Eventually, she reached a final height of fifty five feet tall as she played the final note of the movement. The crowd was cheering just a loud as one would at a rock concert. She couldn’t help but smile at the roaring crowd in the streets and took a final bow.

Her eyes then drifted down to see her new changes. Since her breasts were so large, she could not see her feet anymore. She felt the milk drip onto her legs, tickling them. She realized that she could barely get her giant arms around the back of her swelled up flank. She blushed and giggled, realizing she truly was literally the embodiment of a music goddess in Equestria.

“Thank you everypony. This has truly been the best concert of my life.”

She heard her hoard of fans chant her name for what seemed like minutes. She waved to the crowd, soaking in all of the love and smiling for all to see as the full moon illuminated her body.

Author's Note

SO! After working closely with Megapone for the past couple of days, I have remade this entire chapter for all of your fetish needs!

Enjoy, everyone! :)