WHY ARE YOU ALL TRIPPING??? No one said shit when when Kanye worked with Gaga. And that song came out kinda hot. So y all the sudden she off limits to rappers?? Open your minds people!!! No artist wants to be trapped in a box. Everyone wants to do something different or go OUTSIDE the box at some point in their career. What about when Jay-z worked with Chris Martin and all them other artists that most rappers don't even know who they are?? Who's the guy singing on Forever Young?? I can't even think of his name because I never heard of him before. You people need to stop.