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Watch: Jersey Shore's Pauly D Fist-Pumps With Justin Bieber

"Jersey Shore" co-star Pauly D has a fever, and the only cure is more -- no, not cowbell -- Justin Bieber.

Jersey Shore's Pauly D Live Q&A Archived Video

In yet another puzzle piece of Bieber's massive "Never Say Never" promotional plan, the teen idol goofed off on camera with "The Situation" and Pauly D of "Jersey Shore." And several things we never thought we'd see went down in the videos: Justin Bieber fist-pumping, Pauly D with shaggy hair, "The Situation" as a "professor."

Video: Pauly D Channels Justin Bieber

Video: "The Situation" Hangs With Justin Bieber

"My hair won't even stand up anymore, and I can't stop buying purple pants -- I think I've got Bieber Fever," says Pauly D in his clip. It's true -- dude's copping Biebs' style in the clip, and it just seems unnatural.

Also unnatural: "The Situation" teaching a class called "Pimp 101," in which his homework assignment is to see "Never Say Never."