Green Day finally does something remotely punk rock: “I’m not Justin Bieber you mother*******!”

Ooh he yelled at a bunch of fat, 40-year-old yuppies in sandals and their children. Tough guy…

Armstrong will be treated for substance abuse, according to a statement from the band released Sunday.

Armstrong became irate when he realized the end of the band’s scheduled 30-minute set was nearing its end. “They say we got nine minutes left! I say boo to that f—ing s—!”

“I’ve been around since 19-f—ing-88!” he continued. “I’m not f—ing Justin Bieber, you motherf—ers. This is a f—ing joke! And now you’re gonna give me one minute? Now I got nothing left. I got nothing left. I’m gonna show you what one f—ing minute looks like.”

Hmmm. Something tells be Billie Joe Armstrong would never try this in front of an urban crowd.