Britney Spears's Changing Looks

The one-time brunette 16-year-old scored a major hit with "Baby One More Time."

"Her hair is usually so in-her-face and straight," hairstylist Philip Carreon said of the Crossroads star's Grammys mane. "Our inspiration was Diana Ross in Mahogany: late eighties-style big hair."

The iconic blonde married Kevin Federline and embarked on her "Onyx Hotel" tour.

"I just wanted to try something different," Spears said of the dark locks she sported while pregnant with son Jayden James.

Soon after the birth of her second child, Spears went back to blond and experimented with a blunt bob.

Spears released Circus and planned for a worldwide tour.

Spears showed off newly platinum locks at the Teen Choice Awards, where she was presented with the Ultimate Choice Award by Miley Cyrus.

Brunette Britney! The singer went dark again for the Grammys.

The Femme Fatale singer returned in classic form with long blond waves.

Spears accented her big brown eyes with smoky shadow for a pre-Grammys event.

Britney got bangs! Spears swept them to the side for a party for The X Factor.

Sticking to her classic blonde roots, Spears let her face-framing layers accent her bold smoky eye.

The star debuts auburn hair at an Academy Awards viewing party.

Spears updates her signature shade with a bob while promoting her lingerie collection.

The singer sported sleek blonde strands with a hot pink lip at the Billboard Music Awards.

Britney rocked a pale lip gloss and killer neckline at the MTV Video Music Awards.