Taylor Swift performs “I Knew Your Were Trouble” at the 40th Annual 

Taylor Swift performs “I Knew Your Were Trouble” at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Associated Press
Taylor Swift performs “I Knew Your Were Trouble” at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
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