Green Day frontman Billie Joe Armstrong is entering rehab after a nuclear-level meltdown on-stage at the iHeart Radio Music Festival in Vegas.
He freaked out when he felt the band's time was cut short, screamed "I'm not f**kin' Justin Bieber, you motherf**kers!" and smashed a guitar (watch above).
It was pretty awesome, but of course we're sorry to hear it stemmed from a substance problem.
Green Day has an album coming out on Tuesday, called Uno. As in "Uno F**kin' Minute!?!?"