Rarity had such high expectations for her night at the Gala, it was the event that had kept her going for so long.....and yet it ended in disappointment.
Little did her friends know that she had been suffering from a deep depression brought on by the fact that nopony was as perfect as her.

Also, since someone asked me to source the image: http://theshadowbrony.deviantart.com/art/Depression-259146797