Taylor Swift performs at the iHeartRadio Music Festival at the MGM Grand Garden Arena on September 19, 2014 in Las Vegas, Nevada. (Photo by Al Powers/Powers Imagery/Invision/AP)
Taylor Swift arrives at the iHeartRadio Music Festival, Friday, Sept. 19, 2014, at The MGM Grand Garden Arena in Las Vegas. (Photo by Andrew Estey/Invision/AP)
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