The clock is ticking down to the premiere of Beyoncé’s new video for “Countdown,” the third single off her latest album 4. The pregnant diva channels screen siren Audrey Hepburn in a black turtleneck, turns her body into a human clock, and rocks colorful leotards in the Adria Petty-directed clip, which debuts in full on Thursday. Watch a 38-second sneak peek now!