Bieber. (Jason Merritt/Getty Images)
Armstrong. (Chelsea Lauren/WireImage)
"You're gonna give me one minute?!" he yelled into the mic. "I've been around since f--king nineteen eighty f--king eight, and you're gonna give me one minute?! You've gotta be f--king kidding me! I'm not f--king Justin Bieber, you motherf--kers!" … and then Armstrong, 40, smashed his guitar to pieces.
WARNING: The following video contains explicit language
The 18-year-old singer seems to be a touchy subject for Armstrong. According to Howard Stern, when Green Day appeared on "America's Got Talent" on September 13, a pre-recorded performance by Bieber played before the band hit the stage and Stern says he noticed Armstrong shaking his head in disapproval as he watched backstage.
It's unclear why Armstrong dislikes Bieber so very much. Maybe one of his sons (Joseph, 17, and Jakob, 14) is a fan and has played "Baby" a few too many times at home?
Green Day has postponed upcoming appearances as Armstrong seeks help for his issues. The band is releasing the first of three new albums, Uno, tomorrow.
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