Green Day frontman, Billie Joe Armstrong has entered rehab for substance abuse. The announcement comes on the heels of a very vocal outburst during a recent appearance at the I Heart Radio Music Festival. In a statement on their website, representatives for the band stated, “Billie Joe is seeking treatment for substance abuse.  We would like everyone to know that our set was not cut short by Clear Channel and to apologize to those we offended at the iHeartRadio Festival in Las Vegas.  We regretfully must postpone some of our upcoming promotional appearances.”

Earlier this month, Armstrong was hospitalized while in Italy, where the band was scheduled to play in Bologna. Bassist Mike Dirnt and drummer Tré Cool recorded a short video to apologize to fans stating, “the doctors don’t think it’s a good idea for him to play.” At the time, no further details were provided. The pop-punk band’s lead singer has admitted to taking drugs in the past, which have included methamphetamine, acid and marijuana. After being arrested in 2003 for drinking and driving, Armstrong stated he would give up drugs, going on to say, “What will I never do again? Methamphetamine. I’d rather be huffing gas than sticking speed up my nose. “I can’t do acid anymore, either. I would end up naked on top of the building, sucking my thumb and trying to find a happy place if I was ever to drop acid again.”

The first of a trilogy of albums, ¡Uno! is scheduled to be released this Tuesday with ¡Dos! and ¡Tré! to follow in November and January, respectively.

Green Day Billie Joe freaks out at the I Heart Radio Music Festival and smashes guitar