Justin Bieber wasn't even present when Billie Joe Armstrong blasted him at iHeart Radio Fest on Friday.
So why him?? Why'd he target the Biebs???
Well WE think it's cuz he's Usher's protégé!!
You see… Green Day had to shorten their time on stage because Usher was given more time to perform.
Furious with feelings of disrespect, the frontman went off about his band's tenure in the industry. Basically saying they deserved more than the treatment they were given (true), he then said: