Green Day's Billie Joe Armstrong joins London covers band in pub

What do you do when one of your childhood heroes joins you on-stage as you cover one of their songs?

Billie Joe Armstrong Joins Green Day Cover Band For 'Basket Case

Green Day Invite Disabled Fan to Play Guitar Onstage

Billie Joe Armstrong Joins Cover Band on Green Day Song

Green Day's Billie Joe Armstrong joins cover band on stage in

Green Day's Billie Joe Armstrong Jumps On Stage In London Pub

Watch Billie Joe Armstrong Sing Basket Case With Shocked Green Day

Green Day side project The Coverups pay tribute to Jerry Lee Lewis

GREEN DAY's Billie Joe Armstrong Surprises Cover Band in Bar and

Green Day's Billie Joe Armstrong Joins Band Onstage at London Bar

Green Day frontman Billie Joe Armstrong surprises rock band with

Green Day's Billie Joe Armstrong joins London covers band in pub

Radio X on X: Billie Joe Armstrong of @GreenDay joins fan and

Green Day's Billie Joe Armstrong joins cover band on stage in

Green Day's Billie Joe Armstrong Performs With London Cover Band