If you can believe it, Green Day’s Billie Joe Armstrong didn’t know how to play beer pong…that is until Post Malone taught him.  Armstrong recently attended a Post Malone show. Footage of a backstage meet-up was captured for Instagram.

Photographer Grady Brannan captioned the picture saying, “Two a**holes and a rock’n’roll legend… We taught Billie Joe Armstrong how to play beer pong tonight…Green Day literally raised me and I’m still star-struck.” The photo of Billie Joe playing beer pong allegedly for the first time is on Brannan’s page.

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