It was all his grandma’s idea, apparently.

Last night, Justin Bieber decided to strip down to his boxers during a surprise appearance at charity fundraiser Fashion Rocks.

Getty Images for Three Lions Entertainment Theo Wargo

This was awkward enough. Especially when he bit his lip.

Getty Images for Three Lions Entertainment Theo Wargo

Oh, and inexplicably did some lunges.

Err wtf.

Getty Images for Three Lions Entertainment Theo Wargo

But EVEN MORE awkward was the fact that Biebs was booed by the crowd throughout his striptease. Which was also broadcast live.

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