Laconic / My Little Pony: Friendship Is Magic S1 E18 "The Show Stoppers"

Showtime! When life gave them lemons, the Cutie Mark Crusaders made apple juice instead...
CUTIEMARKCRUSADERSUNABRIDGEDVERSIONYAY!!!

http://tvtropes.org/pmwiki/pmwiki.php/Laconic/MyLittlePonyFriendshipIsMagicS1E18TheShowStoppers