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Billie Joe Armstrong has checked into rehab, just two days after his onstage meltdown at the iHeartRadio music festival Friday.
"Green Day's Billie Joe Armstrong is seeking treatment for substance abuse," his rep told E! News Sunday. "Green Day would like everyone to know that their set was not cut short by Clear Channel and to apologize to those they offended at the iHeartRadio Festival in Las Vegas. The band regretfully must postpone some of their upcoming promotional appearances."
Green Day has been making the rounds to promote its new album, ¡Uno!, due out Tuesday.