JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
Major Lazer stopped by the iHeartRadio tent at Lollapalooza, but they weren't exactly in the mood for an interview. Watch what happened when Kennedy sat them down.