This Sept. 21, 2012 photo released by Clear Channel shows Billie Joe Armstrong of Green Day performing at the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nev. (AP Photo/Clear Channel, Andrew Swartz)

Associated Press
This Sept. 21, 2012 photo released by Clear Channel shows Billie Joe Armstrong of Green Day performing at the 2012 iHeartRadio Music Festival at  the MGM Grand Garden Arena in Las Vegas, Nev. (AP Photo/Clear Channel, Andrew Swartz)
This Sept. 21, 2012 photo released by Clear Channel shows Billie Joe Armstrong of Green Day performing at the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nev. (AP Photo/Clear Channel, Andrew Swartz)
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