JBiebz Disses Scooter on TV!

Biting the hand that feeds him? All in good fun!

On The Late Show with David Letterman a few days ago, Justin Bieber poked fun at Scooter Braun when Dave started asking questions about his manager.

Justin admitted he was thrown off by the silly first name, too. "Like, 'This guy named Scooter wants to sign me? How professional could this person be?'" JB laughed.

Then he took his diss to the next level: "But it turns out he's got some credibility. He's not old and he's not young. He's like 30... he's really not — he's 29." LOL!