Taylor Swift goes to the Dark Side with Dramatic Dubstep Performance

Taylor stunned the audience at the American Music Awards with her powerful performance of I Knew You Were Trouble, a song that is allegedly about her former flame John Mayer, and even changed outfits mid-song.

Swift, 22, won the Favourite Female Country Artist Award, beating out Miranda Lambert and Carrie Underwood for the prize.

It was a busy night for Taylor Swift at the American Music Awards. Just moments after the Red singer accepted the award for Best Country Female, she returned to the stage for an electrified, dubstep performance of her new single I Knew You Were Trouble.