Justin Bieber has said he's not upset by comments Green Day made about him during the iHeartRadio festival.
Frontman for the punk band Billie Joe Amstrong poked fun at the 'Boyfriend' singer in front of the 18-year-old's mananger when he realised a time restriction was in place over his band's set.
"I'm going to play a f**ing new song," Amstrong said.
"F**k this s**t. Gimme a f**king break. One minute left. One minute f**king left. You're going to give me one minute. I’m not f**king Justin Bieber, you motherf***ers.
According to HollywoodLife.com source the Canadian's manager, Scooter Braun, who was in ear shot of the diss, but didn't seem fazed.
"Scooter was standing right off to the side of the stage when Green Day was performing and he saw the whole thing," a source told the website.
"He didn't care at all. Justin isnt upset, no one is mad."
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Jessie J heads to dinner with Justin Bieber's bodyguard. (Photo credit: WENN.com)