Britney Spears is three times a lady when it comes to the new music video for her single, "Womanizer."

In the video, which made its worldwide premiere on ABC's 20/20 and can be viewed on britneyspears.com, the pop star shows off her newly buff body and does a little role play – as a wife, a working woman and a sexy waitress.

"Womanizer" is the first single off Spears's upcoming album, Circus, which is due out on Dec. 2 – the pop star's 27th birthday.

Watch the video here.
This week's cover

On Newsstands Now!

JOSH & FERGIE: ROCKED BY SCANDAL

Did he cheat with a stripper?

Married less than a year, the couple denies an Atlanta woman’s claims that she and Josh had a fling
Note that this week’s cover of PEOPLE may differ regionally

Save $1.00 off this week's issue. Click here for coupon