About iHeart Radio Festival: This year’s iHeartRadio Music Festival at the MGM Grand in Las Vegas included performances from some of the biggest names in music, including Coldplay, The Killers, Kanye West, Kenny Chesney, Puff Daddy, Jennifer Lopez, Blake Shelton, The Weeknd, Nick Jonas, and more. The CW will telecast a two-night special Tuesday, September 29 and Wednesday, September 30 8:00 -10:00 pm ET/PT.