Chris took to the stage on Sunday night at the Nokia Theatre, Los Angeles for the 2011 American Music Awards. Chris performed 'All Back' and 'Say It With Me' taken from his fantastic album 'F.A.M.E' Alongside Chris, other artists who performed at the American Music Awards included Kelly Clarkson, Christina Aguilera, Justin Bieber and many more. Check out the heartfelt performance Chris gave here.