What's Her Best Hair?

01 of 27

DREW BARRYMORE

Jeff Kravitz/FilmMagic; Dave Allocca/Startraks

Leaving her tousled, casual-cool locks behind, the actress goes ultra-glam at the Grey Gardens N.Y.C. premiere, tucking under her long hair into a ’20s-inspired bob – and adding a veil – just for the night.

02 of 27

JESSICA ALBA

For over a year the actress has kept her hair a dark brown hue, but she hit the streets of L.A. this week with a new honey-blonde color.

03 of 27

CASSIE

The singer declared on Twitter that she shaved off one side of her long hair this week, “B/C I WOKE UP AND FELT LIKE IT!!! YEEEAHHH!!! LOL :)”

04 of 27

JENNIE GARTH

Jason Merritt/Getty; Byron Purvis/AdMedia

The 90210 star changed up her long bob by adding a center part and taking up the length at a book party for her friend Tori Spelling in L.A.

05 of 27

BEYONCé

The singer gets sexy in N.Y.C., changing up her long, straight style with a face-framing shag with blunt bangs.

06 of 27

LINDSAY LOHAN

The newly-single star makes over her look, leaving behind her strawberry blonde hair color for darker auburn locks.

07 of 27

MARIAH CAREY

Mimi swaps her carefully styled curls for natural beachy waves at a benefit in South Africa.

08 of 27

JESSICA ALBA

Vince Flores/Celebrity Photo; Jackson Lee/Splash News

The actress leaves behind the sleek bob she’d favored for months, adding instant length to her locks.

09 of 27

CHRISTINA AGUILERA

She usually plays up the blonde bombshell look with soft waves, but for a birthday party in L.A., the singer went wild with bold corkscrew curls.

10 of 27

JENNY MCCARTHY

The actress swaps her signature blunt bob for longer soft waves at the Bravo A-List Awards in L.A.

11 of 27

HALLE BERRY

The actress gets ready for summer, cutting off inches and lightening up with warm blonde highlights.

12 of 27

ANNE HATHAWAY

The Oscar nominee does a little red-carpet shape shifting, trying out elegant ’30s-inspired waves one evening and then going for a ’60s high-society bouffant another.

13 of 27

BEYONCé

Diane Cohen/Fame;Jakob Polacsek/BuzzFoto/FilmMagic

She’s no stranger to changing up her hairstyle, but for a trip to Vienna, the actress went for a natural look with a cascade of soft, lighter curls.

14 of 27

GWEN STEFANI

When it comes to updos, No Doubt’s frontwoman usually goes for a classic undone style, but to perform on the Today show, she twisted up the back and bangs into edgy top knots.

15 of 27

KELLY OSBOURNE

AVM/MAP/Splash News; Jordan Strauss/WireImage

For months the star has made a raven pixie do her own, but at a magazine party this week, she shook things up by bleaching her hair platinum and spiking it high.

16 of 27

TYRA BANKS

Amanda Schwab/Startraks; Greg Allen/Rex USA

Forget those signature sleek tresses! To celebrate the Met Gala, the supermodel went avant-garde with a chignon plopped stylishly above her forehead.

17 of 27

LEIGHTON MEESTER

She may be famous for Blair Waldorf’s rich brown tresses, but this week Gossip Girl’s Queen Bee went back to her blonde roots.

18 of 27

AUDRINA PATRIDGE

The Hills star lightens up for spring, trading her signature dark brown tresses for sun-kissed locks.

19 of 27

RIHANNA

The fashion chameleon breaks up her monochromatic raven hair with platinum highlights.

20 of 27

VICTORIA BECKHAM

Never one to get stuck in a style rut, Posh slicks back her short do for a charity fashion event, then goes for natural volume and softly-swept bangs to unveil her latest Armani underwear ads.

21 of 27

ELIZABETH BANKS

Saying bye-bye to her signature bob, the actress adds over a foot of length and sweeps back her hair into a high-fashion ponytail for the Met Gala.

22 of 27

HEIDI MONTAG

She typically prefers a head full of waves and volume amped up to 10 – but for a lunch in Beverly Hills with her grandmother-in-law, the newlywed puts her hair on the straight-and-narrow, taming it into a sleek style.

23 of 27

HALLE BERRY

After trimming her long hair into a bob for spring, Berry got set for summer by chopping off even more inches for a pixie cut reminiscent of the short style she wore early in her career.

24 of 27

KATE HUDSON

Hollywood’s golden girl leaves her beauty trademark behind, stepping out in L.A. with a bold new brunette do.

25 of 27

ASHLEE SIMPSON-WENTZ

Same night, different do! The star hits the CW upfront presentation in New York’s Madison Square Garden with long, straight layers, then tries tousled waves for the afterparty later that evening.

26 of 27

TYRA BANKS

Amanda Schwab/Startraks; Jennifer Mitchell/Splash News Online

The talk show host gives fans something to buzz about, changing up her honey-blonde hair to a chocolate brown.

27 of 27

ADRIENNE BAILON

“I wanted to look like the Versace ad where the girls had these blunt-cut bangs,” the former Cheetah Girl tells PEOPLE.com of her decision to trade her soft layers for a fashion-forward fringe.