"Womanizer", the music video for Britney Spear's first single from her next CD, Circus (out Dec. 2), debuted Friday night on ABC's 20/20. Directed by Joseph Kahn ("Toxic"), the video finds Brit playing a vamp in a three part role-playing fantasy - the corporate tease, freaky waitress, and horny chauffer.

The video is a return to form for the troubled pop star, who over the past couple of years had devolved into a slightly chubbier and much more crazy version of her self. Presumably back on her meds, Britney Spears is looking fitter than she has in a long time and has had remarkably fewer crazy moments in recent months. She's now poised for the comeback she promised at the MTV video awards in 2007, and this time it doesn't look like she is going to fall flat on her face.

Check out the video here: