After I saw the last new episode This came into my head, After I knocked it around for a while before I wrote this down. Basically it's the song by Eminem parodied.

It's best if you think of Pinkie Pie singing it.
It would also help if you have heard the song it's based off of. I'd post a link to the song on YouTube, but that would be stealing, and stealing is wrong. *wink*