Justin Bieber made a surprise appearance during Chris D'Elia's set at the Laugh Factory on Friday (Dec. 13). The Boy Wonder was invited on the stage and quickly became the target of D'Elia's jokes and the punchline. He also made his own potty-mouthed comment.

Hey, he asked for it by agreeing to get on stage... And by what he wore. D'Elia let 'er rip, going to town on every aspect of The Biebs' uniform, from his leather choices to his accessories.

If you are a Belieber, take a chill pill, because this is about to get painful and ugly. Anyone over the age of 18 will appreciate the humor, since it's hilarious!

His attire was attacked first. His watch was then criticized.

The Biebs sat there on a stool, with his arms folded over his chest, grinning and taking his roasting and ribbing like a man -- even though he recently told Ryan Seacrest that he is languishing in the nebulous, in-between phase of boyhood and manhood.

At the 1:48 mark, the comedian said The Biebs f--ks himself and that's when the singer's potty mouth came to light, as he answered "And b---hes."

All in good fun!