Just over a week ago Foster The People officially made it when music heavyweights Weezer covered their insanely catchy summer anthem, "Pumped Up Kicks". Now to return the favour LA boys Foster The People decided to play "Say It Ain't So" at a recent show in Brooklyn's Prospect Park. When Weezer did their cover they made "Pumped Up Kicks" their own and it sounded like a Weezer track through and through. FTP have done a decent cover but it's the more straight up kind, the ones where it could just be any other guys playing the track and it still sounds like the original. You know? Fair play to the guys though for giving it a good go and not slaughtering it into some unrecognisable mess, instead it's just a decent cover of a classic Weezer track. Check it out at the top via We All Want Someone.