Rocking the stage last night at the Brit Awards 2013 in London, England, Taylor Swift got a bad girl makeoever during her performance of " I Knew Your Were Trouble"! Starting out wearing a white dress, she ended the song wearing a risque black leather outfit. Wowza! Maybe she was performing for her famous ex-boyfriend watching in the audience, One Direction's Harry Styles! He told reporters that he "thought she looked great". Taylor was nominated for Best International Solo artist but lost out to Lana del Ray. Watch the original music video for the song below!