It’s a regular occurrence for Green Day to bring fans onstage to play guitar and cover Operation Ivy’s Knowledge with the band – but at San Francisco’s Outside Lands festival on August 6, the lucky chosen gig-goer was only 10 years old!
According to the San Francisco Chronicle, the Bay Area heroes picked out young Montgomery for the performance, with frontman Billie Joe Armstrong reportedly giving him the nickname Monty, as the crowd then chanted that name. (It’s also worth noting Monty was wearing a T-shirt that had Billie Joe’s iconic American Idiot black-shirt-and-red-tie look on it – amazing!)