"Somebody in the room suggested we get Lady Gaga to sing the hook on 'I Need a Doctor' and [Eminem] stood up for me and said no, because he wanted to keep my voice on the song. That was a big thing for me because had I not kept my voice on 'I Need a Doctor,' who knows where I'd be right now." - Skylar Grey, on the making of Dr. Dre and Eminem’s “I Need A Doctor.” [via HipHopDX]