Photos: iHeartRadio Music Festival
iHeartRadio Music Festival
Credit: Getty Images for Clear Channel
LAS VEGAS, NV - SEPTEMBER 21: Billie Joe Armstrong of Green Day performs onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 21, 2012 in Las Vegas, Nevada. (Photo by Michael Kovac/Getty Images for Clear Channel)
