The Chainsmokers first gained notoriety with the zeitgeist-grabbing megahit "#Selfie"—but they've come a long way from the days of disposable earworms. They're still making infectious tunes, but now they come with a poignancy to match the polish. "Closer" rides a wave of EDM-tinged beats and supple retro synths, boosted by a dazzling cameo from Halsey. It manages to capture the fleeting beauty of youthful romance and still fill the dance floor—and that’s why it's our editors' pick for Best Song of 2016.