Pink, Taylor Swift, Nicki Minaj, Christina Aguilera, Carrie Underwood, Pitbull and Linkin Park had already been booked to perform at the American Music Awards, and now, some more artists are joining the fray. Usher, No Doubt, Justin Bieber and Ke$ha will also take the stage at the Nov. 18 award show. Rihanna and Minaj have four nominations, the most of any other artist. Drake, Bieber, Maroon 5, One Direction, Usher, Underwood and Pitbull are up for two awards each.