iHeartRadio has announced the lineup of superstars set to perform at KIIS FM Wango Tango, to be held at Dignity Health Sports Park in Los Angeles on June 4. Hosted by Ryan Seacrest, this year’s Wango Tango will feature performances from Shawn Mendes, The Chainsmokers, Camila Cabello, Becky G, Charlie Puth, Lauv, 5 Seconds of…