Guess Which 'DWTS' Pro This Cute Kid Turned Into!

Before this cute kid rockin' a bowl cut turned into a dancing machine, he was learning the moves in preparation for his bar mitzvah -- and by age 17, he'd already become a world champion dancer ...

You definitely know him best from his plethora of routines on "Dancing With the Stars." One of his most famous partners was "Jersey Shore" icon Snooki!