Ew! We love Jimmy Fallon 's "Ew!" skit so much, and seeing Neighbors stars Zac Efron  and Seth Rogen  is like awesomeness overload. Fallon reprised his role as "Sara" (with no H, because H's are ew) on The Tonight Show, and guests Rogen and Efron gamely played along. Watch them whip out a series of selfies and a dance party while barely hiding their (quite manly) arms. There's even a pretty good James Franco  joke. One more time: Ew!