FILE - This Sept. 21, 2012 file photo shows Billie Joe Armstrong 

FILE - This Sept. 21, 2012 file photo shows Billie Joe Armstrong of Green Day on stage at the iHeart Radio Music Festival at the MGM Grand Arena in Las Vegas.  Green Day revs up for a world tour that was postponed by Armstrong entering rehab when the Grammy-winning punk band plays the South by Southwest music festival on Friday night, March 15, 2013. (Photo by Eric Reed/Invision/AP, file)
Associated Press
FILE - This Sept. 21, 2012 file photo shows Billie Joe Armstrong of Green Day on stage at the iHeart Radio Music Festival at the MGM Grand Arena in Las Vegas. Green Day revs up for a world tour that was postponed by Armstrong entering rehab when the Grammy-winning punk band plays the South by Southwest music festival on Friday night, March 15, 2013. (Photo by Eric Reed/Invision/AP, file)
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