Wiz Khalifa
Wiz signed a deal with Warner Bros. in 2007 and released a charting single, "Say Yeah," and a couple of buzzed-about mixtapes. But after several pushbacks to his planned debut album, Wiz parted ways with Warner in 2009. A year later, he inked a new deal with Atlantic Records and slienced naysayers with the massive success of his No. 1 hit "Black and Yellow."
(Photo: Chris Blumenshine/PictureGroup)