We're hard-pressed to think of two bigger opposites than Tina Fey and the cast of Jersey Shore. That may be why Fey is so amazing in this Late Night with Jimmy Fallon sketch, about a secret "Jersey Floor" in 30 Rockefeller Center that transforms NBC celebs into ultra-tanned guidos and guidettes. Fey replaces her signature glasses with teased hair and blue eyeshadow to play a Jersey nightclub stalker, screaming "I wanna have babies wit' you!" at a spiky-haired Fallon. In the end, Fey gets into catfight with longtime friends Amy Poehler and Rachel Dratch, reminding us what her one similarity to Jersey Shore actually is: They're both wildly entertaining.