UPDATE: In the wake of this incident, Billie Joe is going to rehab.

Green Day

"I'm not fucking Justin Bieber you motherfuckers!", says Billie Joe in the entertaining video below...

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"Green Day had their set cut in half so Usher could have more time. Billie is drunk and freaks out and him and Mike smash their gear."

This happened last night at the iHeartRadio fest in Las Vegas that Rihanna, No Doubt, Pink and Usher also played. Justin Bieber was not on the bill.