Britney Spears Works as a Waitress – in Her Video

By Rennie Dyball

09/25/2008 at 01:00 PM EDT

Britney Spears is getting back to work in a big way. On Wednesday, the pop star – incognito in a black wig and red lipstick – filmed the video for her upcoming single, "Womanizer," and will continue shooting Thursday, sources tell PEOPLE.

Filming took place Wednesday at Elevate Lounge, a club located within Takami Sushi & Robata restaurant on the 21st floor of an office building in downtown L.A., says a source. In the video, directed by Joseph Kahn (who worked with Spears on "Toxic" and "Stronger"), she plays a waitress.

Dancers arrived at the shoot Wednesday morning dressed in waiter uniforms of white dress shirts, skinny ties, and black pants or leggings.

"Womanizer," the first single off Spears’ upcoming album Circus will hit radio soon, says a source, and Spears will start practicing live performances next month.

• Reporting by ALONDRA HERNANDEZ, MAUREEN HARRINGTON and PERNILLA CEDENHEIM

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