Green Day front man Billie Joe Armstrong's admittance to rehab after his very public on-stage meltdown at iHeartRadio Music Festival was a long time coming, reports the Chicago Sun Times.

"You're going to give me one minute? One f---ing minute? I've been around since f---ing 19 f---ing 80 f---ing 8, and you're going to give me one f---ing minute? I'm not f---ing Justin Bieber, you motherf---ers." That was Armstrong's rather dramatic response to the "one-minute" warning being flashed at him from a TelePrompter monitor. He then stormed off stage smashing his guitar as he exited. The band have recently apologised for his outburst, and the punk singer has since agreed to go to rehab to be treated for substance misuse. "Billie Joe has been a loose cannon for a long time," said a Green Day insider. "It's long past time when he should be getting some serious help."

An official statement on the band's Facebook page had previously alerted fans to the singers plight, and seek for help: "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." We at Contactmusic wish Billy all the best as we listen to Greenday hits all day. Get well soon!