23. Nicki Minaj Dominates (2010)
Before dropping her debut, Pink Friday, Nicki Minaj seemed to be on everybody else's song. So it was no surprise that the Black Barbie would be all over that Summer Jam stage—even through she didn't have her own set. The Queens representer stole the show from Drake, Ludacris, DJ Khaled and Usher, rocking a different kooky outfit every time. Who's bad?