It's been awhile since we've heard from Vampire Weekend, but the New York band took to Jimmy Kimmel Live last night sporting Halloween-themed skull makeup. The talk show is taping in Brooklyn all week long, and for the home crowd, Ezra Koenig and Co. decided to debut a new song called "Unbelievers." There's no word if it's tied to a release anytime soon, but it certainly sounds like them, marrying a catchy melody to an insistant, Paul Simon-esque beat and a horn section. And for the web, Vampire Weekend trotted out the old classic "Oxford Comma" (complete with a bleeped-out "fuck," which is weird). Watch both performances below.