Sources tell MediaTakeOut.com the rapper was caught out when he mimed the lyrics to Amusement Park over an instrumental version of the track mistakenly played by his DJ Whoo Kidd. One eagle-eyed audience member who spotted the split-second gaffe, says, "The whole thing was so embarrassing. To get caught like that in front of millions of people is almost unimaginable."

[see full story for more while you ponder why in the hell anyone would need to lip sync a rap song?] - more on this story