Here’s the exciting lineup announced for this year’s iHeart Radio Music Festival September 18 and 19th at the MGM Grand: Kanye West, Sam Smith, The Who, Coldplay, Demi Lovato, David Guetta, Kenny Chesney, The Weeknd, Tove Lo, Lil Wayne, Fall Out Boy, Disclosure, Hozier, Jason Derulo, Duran Duran, Prince Royce, Diplo, Trey Songz, The Killers, Blake Shelton, Nick Jonas, Janet Jackson and More Special Surprise Guests to Hit the iHeartRadio Music Festival Stage The iHeartRadio Music Festival will Broadcast Live on iHeartMedia Radio Stations, Exclusively Live Stream on Yahoo Screen, and Air as an Exclusive Two-Night Special on The CW on September 29 and 30th