WATCH: Young Green Day Fan Joins His Heroes Onstage

Green Day’s Billie Joe Armstrong invited a young fan onstage to play with them on their cover of Operation Ivy classic, “Knowledge”.

They regularly invite fans onto the stage when they play the track – but the fan called Grant stole the show when he helped the band through the track, drawing huge cheers from the crowd at Worcester’s DCU Center in Massachusetts.

Armstrong spots Grant in the crowd and asks him: “How long have you known how to play the guitar? Do you know three chords? All right, get your ass up here!”

The Green Day singer then shows him how to play, before the boy launches into the riff to huge cheers. He then joins Armstrong to sing the track.

At the end of the performance, Armstrong gives him the advice: “Never smash a guitar” before telling him he can keep the instrument. Watch the clip below!

Original article by Scott Munro at iHeartRadio