One Direction might have debuted at No. 2 on the Billboard charts behind Justin Bieber, but they won the top award at Sunday's American Music Awards. "This is a testament to how incredible our fans ...

Charli XCX, Sam Smith and 5 Seconds of Summer also attend the American Music Awards at Nokia Theatre L.A. Live on Sunday. Liam Payne, from left, Niall Horan, Louis Tomlinson, Zayn Malik and Harry ...