Green Day performed at the iHeartRadio Festival 2102, but the band’s set was cut short due to Usher more time to play to his fans. This resulted in Billie Joe Armstrong going on a rant mid-song, smashing his guitar, and then walking off-stage with the rest of the band. Watch the video below. What a lack of respect for a band that has been around since the 80's. Just people they aren't a boyband doesn't mean they shouldn't to play their whole set.