Green Day frontman Billie Joe Armstrong flipped out on stage while performing at the IHeartRadio music festival Friday.
With only a minute left in the band's set — which had been cut 20 minutes to give Usher more time — the singer began a profanity-filled rant, complaining that he and his band deserved more respect than they were receiving.
Christina Aguilera recently recruited Armstrong to be a mentor for her team on The Voice this fall. The "Genie in a Bottle" singer famously snubbed a hug from The Biebs during Season 2 of the reality show. Could their '90s stardom and mutual dislike for the young star have brought this unlikely duo together? (Though Aguilera denies ever dissing Bieber.)
Watch the full rant below: