Billie Joe Armstrong of Green Day performs Sept. 21, 2012, at the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas. (Associated Press/Clear Channel, Andrew Swartz)

Photo by: Andrew Swartz

Billie Joe Armstrong of Green Day performs Sept. 21, 2012, at the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas. (Associated Press/Clear Channel, Andrew Swartz)