FIRST LOOK: Britney's 'Womanizer' Video

The pop star shows off three sexy looks – as a waitress, a secretary and herself – in her latest video

Credit: Frank Micelotta/Getty

Updated: Tuesday Oct 07, 2008 | 03:35 PM EDT

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Wearing a short black bob and glasses, the singer, 26, also dresses up as a scandalous secretary and gives a coworker a lap dance in the video, which will premiere this Friday on ABC's 20/20.