Billie Joe Armstrong walks into a bar… for a surprise 'Basket Case' performance: Watch

Check out the surprise performance
Billie Joe Armstrong
Photo credit Kevin Winter/Getty Images

Green Day frontman, Billie Joe Armstrong, gave a London cover band, Borderline Toxic, and bar full of patrons the surprise of a lifetime yesterday when he showed up, crashing the band’s set.

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It all went down at Slim Jim’s Liquor Store in London where Armstrong happened to walk in while on holiday in London.

“When you walk into a pub and the cover band starts playing your song,” Green Day posted to Instagram with a video of Armstrong rocking out on stage with the band.

Borderline Toxic also took to social media to share their shock and gratitude for Armstrong hopping on stage with them.

“The moment your band gets joined on stage by your childhood idol to sing their own song with you… in your favourite dive bar,” they wrote. “Billie Joe Armstrong… THANK YOU, YOU LEGEND! This was the first band to get me into rock when I was 11 years old and I’m honestly just so made up.”

Green Day is scheduled to play the When We Were Young music festival in October in addition to a slew of other performances over the summer. Get tickets here.

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Featured Image Photo Credit: Kevin Winter/Getty Images