I am always impressed by the talents of the MLP:FiM fandom. But sometimes I get to hear something that takes me so far beyond impressed that I can hardly find the words to express how awesome it is.
This submission from ThunderDash is one of those amazing pieces. He calls it The Cupcake Song INSANE Piano Edition, and I can't contest that title. You just have to listen to it yourself and you'll understand. Then, if you're really daring, you can check out the sheet music and try playing it yourself.