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Rihanna, Taylor Swift and more at the iHeartRadio Music Festival

Singer Rihanna performs onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 21, 2012 in Las Vegas, Nevada. <span class=meta>(Christopher Polk/Getty Images for Clear Channel)</span>
November 1, 2012 12:51:07 PM PDT