June 13, 2011 Photos | 2011 Billboard Music Awards Edit Delete Tags Autopost 2011 Billboard Music Awards Related Artists Britney Spears Rihanna Nicki Minaj Ke$ha Beyoncé Source: http://www.mtv.com/photos/?fid=1664371Katy Perry Keira Knightley Kelly Brook Kelly Carlson Kelly Clarkson Kelly Hu