She sported schoolgirl pigtails for "...Baby One More Time," a super high ponytail for "Oops!...I Did it Again," and a short black wig for "Womanizer."

And in her latest music video for "I Wanna Go," the throbbing third single from her acclaimed album Femme Fatale, Britney Spears, 29, rocks multi-hued hair extensions.

PHOTOS: Britney's wild life so far

"Britney was headed in the direction of 'emo girl.' All the colors came as a way to soften the bad girl image of the video but still keep it Britney," a stylist who worked on the pop star's hair tells Us Weekly.

VIDEO: Check out her sexiest video yet

And she didn't have to sit for hours to get this look, since her on set stylists used She by So.Cap. USA clip-on extensions rather than the bonded ones. In the video Brit curses out a room of reporters and photographers during a press conference. (One of the questions concerns a supposed love child with Brad Pitt!)

PHOTOS: Her incredible bikini body

Taking to the streets, the singer goes on a rebellious rampage -- opening up her top to a sexy policeman and getting cuffed. Next, she does battle (swinging a lethal, long-corded microphone) with photographers . . . who may or may not be human?!

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