He plays himself in the video, but his look is that of a tapori (hoodlum) - inspired by one of the characters in the film.
The song has a very Mumbai feel and is a mix of street instruments, local voices and dialect. It has been sung by music composer Amit Trivedi and his mother, while choreographers Bosco-Caeser have mixed street dancing with contemporary style for it.
"Ranbir Kapoor saw the film and loved it. That's when we requested him if he would do an item song for the kids and he loved the idea, and readily agreed, " said a source from the production unit.
"Chillar Party" is set for a May release.