Green Day frontman Billie Joe Armstrong has entered rehab for "substance abuse" following an onstage meltdown at a performance at a Las Vegas festival performance.

Watch the video of the incident below and tell us what you think.

Following the event at the weekend, the band posted the following statement on their website last night:

"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."

More information as we get it.

The band's new album, '¡Uno!', is out today.