Billie Eilish, Coldplay, Weezer and Dua Lipa are among the acts set to play this year’s iHeartRadio Festival.The two-day event is coming to Las Vegas in September, and will also feature Olivia Rodrigo, DaBaby, Maroon 5, Khalid and more.On September 17-18 at the T-Mobile Arena, acts will perform across two stages.