LAS VEGAS, Sept. 19 (UPI) -- The star-studded, 5th iHeartRADIO Music Festival is underway in Las Vegas with a lineup that includes Sam Smith, Coldplay, Jason Derulo and Demi Lovato.
Also taking the stage throughout Friday's opening of the weekend event at the MGM Grand Garden Arena were Disclosure, Kenny Chesney, Lil Wayne, The Killers, Duran Duran, David Guetta and Kanye West.
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