Britney plays the sexy secretary [and Sexy Zebra] as she unveils three sizzling looks [alters] in her comeback video

Fans have seen many sides of Britney Spears over the past year - but her latest transformation is darker than ever.In the video for her single Womanizer, which is scheduled to be premiered in the U.S. on Friday [will post it with analysis], the rehabilitated singer displays three dramatically different looks [remember she rode #3 kart; probably has something to do with 3 main alters acting as