I told you to go right

Since Shining still had an operational horn, and he could hold the shield spell for 4 hours before having to replenish it, that meant that we could have rooms for the evening before we got to work the next day. When we were allotted our rooms for the night, I literally dropped to sleep like a fucking stone in a few seconds. The only dream I had was literally just an image of Nightmare and Luna making out, but that was it. Usually, Luna herself would invade my mind and at least help in getting me to stay asleep so I could rest, but she didn't. I was thankful; it meant that I wasn't being woken up by anything, or distracted by anyone. It was a very refreshing 12 hour sleep, that ended at 8:00 in the morning with the sound of a bird flying in through my window. It even decided to perch itself on my snout, and simply stared at me as I opened my eyes to see this tiny little bluebird looking me in the eyes.
"Sup." I groaned, before getting myself out of bed. I noticed I did it a lot faster than I did before, and that I was more alert. For instance, the first thing I noticed was the fact that someone had put my breakfast on a tray and left it on a table. I would normally have walked past that a good few times before I'd notice it, so that was a start. Stretching in a 'cum inside Rainbow Dash' way, I then had a quick shower and picked up my cup of hot coffee. Then, I opened the doors to the balcony. All around was a huge city of crystals, with small, depressed ponies all trudging about in the streets below the Crystal Palace. They looked half asleep, and I couldn't do anything about that; until I noticed the Intercom System Speakers dotted around the place, probably a new addition by Cadence and Shining's forces.
I immediately had an idea; I hadn't brought many weapons along with me, and even though I can pull fucking crowbars from nowhere, I figured I had no purpose. So why not pull an Adrian Cronauer and give some...motivational support for these ponies? First, though, I had to finish my breakfast.

"Princess Cadence!" I greeted the mare. She seemed genuinely happy to see me.
"Thunder!" she smiled. "Good to see you fully rested! How can I help you?"
"Well, you know how there's...like...an PA system?" Cadence nodded. "Would it be possible for me to help with cheering these ponies up using it?" She tapped her hood to her chin.
"I suppose so. What are you planning to do with it?"
"Play music, do shout-outs, read out news, interviews, that kind of thing."
"Like a radio?"
"Yeah, like that! There was a war back home, nasty war between one massive country and a smaller country, the Vietnam war. Several films were made on the topic, and one was called 'Good Morning, Vietnam!' A guy gave morale and motivational support for the troops using a radio broadcast, so I figured that the best method to cheer up loads of ponies is to cheer them all up at once. Sound good, Princess?"
"Certainly! If it cheers up my people, then I'm all for it. I'll order a few guards to help you bring the PA system hub to where you need it, then we can really get to cheering them up whilst we hunt for the Crystal Heart."

The 'radio station' was set up just in the middle of the main shopping district. This was also the place where the girls and guys would be setting up stalls and games for the Crystal Ponies to access and cheer themselves up with. A small crowd of Crystal Ponies had gathered nearby, all looking incredibly depressed and a tad interested at what we had set up. I'd already finished setting up, and had my DJ gear on; my jacket, a pair of Aviator Shades, a pair of Beats headphones from my brother slung around my neck, and a set of casual shoes. Finally, I cleared my throat, pressed the button down, and the sound of beat playing over the intercom sounded loudly.
"Good mooooorning, Crystal Empire!" I said cheerfully, as the ponies tilted their heads inquisitively. "You've been gone for years, and we've come to show you just what you guys have missed! I'm DJ Storm, and this is Empire FM!" A few ponies now looked at least interested, before moving off to the other stalls being run by the guys and girls. "First on today's line-up of great tunes is a little somethin' from some boys going by the name of Daft Punk! Let's get this show on the road!" I smacked another button with my hoof, and the speakers began playing Get Lucky as the other guys began calling out for the ponies to come and see what they were offering.

After a few hours, ponies all around were crystalline once more and trotting about with all sorts of wares in the now bustling streets. I even got a few ponies to come and be interviewed, including Cadence and Shining Armor. It was kind of like an 'open-air' radio station, and was proving incredibly popular with the Crystal Ponies. "So, Princess," I began saying to Cadence as the crowds gathered around. We were sat behind the mixing desk on a couple of chairs. "How does it feel knowing that on the day of your wedding, you were responsible for defeating the Queen of the Changeling horde? You're all the talk in the media, as the 'Battle Princess', y'know!"
"Well," she laughed, "It feels pretty great to know I kicked the Changeling Queen to the wastelands. And I'm even more honoured that this Empire has taken me as Princess, to be honest! I love you guys!" A cheer arose from the crowd.
"Well, it seems that way for them, as well!" I replied. "And for those of you who are still chasin' that dream of freedom and fame, I have just the track for you, stay listening, folks!" Then I pressed a button, and BAM, instant Nickelback - Rockstar. I then set a few more songs to play after it, and then I headed off to get something to drink. However, when I reached Inferno's stand to go and get some coffee, I looked up at the castle and noticed...somepony.
Stood on the top balcony and looking down at me was a stallion in a suit.
He fidgeted hs tie, then turned and disappeared.
I warned you, Mr Mustang.