Billie Joe was apparently ticked off about losing 20 minutes of their set time to Usher at the iHeartRadio Music Festival in Las Vegas... he went on a massive tirade on stage.
Things were going ok until a light started flashing indicating that Green Day had just one more minute left onstage.
That's when the F-bombs starting flying and Billie Joe smashed a guitar on stage.
RELATED: It's off to rehab for Billie Joe Armstrong
Green Day's rep made a big announcement yesterday: Billie Joe Armstrong is headed to treatment for substance abuse.
It's not really clear what Armstrong is receiving treatment for, drugs or booze, or both.
After Billie Joe's meltdown onstage at the iHeartRadio Music Festival in Las Vegas on Friday the band issued an apology.
The band also cancelled some of their promotional appearances.
"Uno" hits stores tomorrow and Green Day's nationwide tour kicks off on Nov. 26 in Seattle.