Lena Dunham is admittedly already pretty weird, but the Girls creator went full-on space case on last night’s episode of Late Night With Seth Meyers. Dunham sat in—or, rather, danced in—with musical guest Sia for a performance of  “Chandeliers,” with Dunham flouncing around the stage while the Swedish songwriter lay face down on a bed and sang. It’s safe to say it’s probably one of the weirder things you’ll watch today. As you might expect, GIFs of the jazz-hand-heavy performance are already dotting the Internet.