Halsey Turns Stunning iHeart Festival Performance Into Their Birthday PartyAvril Lavigne Takes Over Las Vegas With Her Pop-Punk HitsPost Malone Hospitalized, Forced To Cancel Show After Previous Stage FallWILLOW Performs Special Acapella Version Of 'Whip My Hair' During Festival Lauv Shares His Most Personal Songs Yet In Stunning iHeartLand DebutLauv Shares The Deeper Meaning Behind His Song 'Modern Loneliness' Chlöe Debuts New Single 'For The Night' During iHeartRadio Music FestivalAvril Lavigne Shares Sweet Moment With GAYLE BackstageCheat Codes Serenades Fans In Front Row During Dynamic Set Lauren Spencer Smith Tugs On Our Heart Strings In Emotional PerformanceJAX Covers Wheatus' 'Teenage Dirtbag' With A Twist Diplo Talks Opening For Bad Bunny Right Before Playing Festival