What's Her Best Hair?

01 of 35

NICOLE RICHIE

The trims off inches and darkens her hair into a wavy, shoulder-length style.

02 of 35

JULIANNE HOUGH

Dee Cercone/Everett; C.Hilbun/JpegFoto/PictureGroup

Over the weekend the budding took to Twitter to reveal a totally new look. Me with darker hair, Hough Tweeted to show off a shot of herself – but, she assured fans, it s still kinda blonde.

03 of 35

JESSICA ALBA

NicePic/MeetTheFamous; Mark Davis/PictureGroup

After a lightning-quick change to red after months of platinum, the is back to her more natural, dark brown color.

04 of 35

RIHANNA

Ahmad Elatab-SaleemElatab/Splash News Online; A. Macpherson/Splash News Online

Continuing her style evolution, unveils the latest permutation of her pompadour, sweeping the top back.

05 of 35

LAUREN CONRAD

pulls her signature long mane into a pretty ponytail to launch her clothing collection with Kohl’s.

06 of 35

ALI LARTER

The Heroes trades the blonde hair that made her famous for fiery auburn locks.

07 of 35

ISABEL LUCAS

Leaving behind her natural brunette color, the Transformers: Revenge of the Fallen star goes platinum blonde.

08 of 35

DREW BARRYMORE

After dipping the ends of her bob in black, the cuts off the punky color for a short and tousled do.

09 of 35

HAYDEN PANETTIERE

The marine-life showed off new blunt bangs while hosting the Whaleman Foundation benefit in Los Angeles.

10 of 35

EMMA ROBERTS

“What better than to show off my new hair than in New York to see if, you know, blondes do have more fun!” the starlet told PEOPLE of trading her dark brown hair for honey-blonde to head to the set for a new role.

11 of 35

PENéLOPE CRUZ

Nine’s sexy promoted her film in N.Y.C. with new tousled bangs, which she pulled back days later for an appearance on The Late Show with David Letterman.

12 of 35

ROBIN WRIGHT

Robin might be know for her layered blonde hair, but the actress changed it up this week at a screening of The Private Life of Pippa Lee with a dark-chocolate brown for a new film part.

13 of 35

KATHARINE MCPHEE

The American Idol swept back her short hair for a red-carpet awards event before letting it fall into natural short layers at a film premiere days later.

14 of 35

KELLIE PICKLER

“The hair doesn t make the person, but it has been a shocker,” the CMA Awards told PEOPLE of her new hair color. “It’s been interesting with red hair because you can t wear the same things. It s an excuse to go shopping!”

15 of 35

ASHLEE SIMPSON-WENTZ

, we hardly recognized you! Broadway s newest star goes from glam red to edgy black in L.A.

16 of 35

SHAKIRA

Music’s fearless gets back to nature, leaving behind her carefully tended curls for new, casual dreadlocks.

17 of 35

CHRISTINA AGUILERA

The shortens up for fall, cutting off inches of long length to create a chin-sweeping, blunt bob.

18 of 35

KRISTEN STEWART

A New Moon calls for a new do! Twilight’s debuted a longer, flipped hairstyle while promoting the series’ latest installment in Paris.

19 of 35

NICOLE KIDMAN

After making strawberry blonde her own for months, the is back to her fiery roots.

20 of 35

FERGIE

Weathering trying times with a totally new look, the premiered bold curled bangs and a high ponytail in Paris.

21 of 35

LEIGHTON MEESTER

Gossip Girl’s takes her style savvy off-set with soft curls one night, followed by straight, sleek hair several days later.

22 of 35

JESSICA SZOHR

Gossip Girl’s put her style on the straight-and-narrow in 2010, cutting off inches of her hair and smoothing the new style into a sleek bob.

23 of 35

RUMER WILLIS

New cut, new curls! showed off a totally different look while shopping in L.A.

24 of 35

KELLIE PICKLER

After lasting just a month as a redhead, the is back to her signature blonde.

25 of 35

SALMA HAYEK

clipped off inches of length, debuting her new bob at a children’s charity gala in Germany.

26 of 35

KATE HUDSON

The actress French braided her bangs for the London premiere of Nine and then went with a classic wavy bob style days for the film’s N.Y.C. premiere.

27 of 35

NICOLE RICHIE

“We have gradually been going darker over the last few months,” says George Papanikolas, Joico celebrity colorist for the Andy Lecompte Salon, who gave the new color she debuted this week. “We started with blond, went to an ombré hair with darker roots and lighter tips and then arrived at this rich sable brown.” The star also added sexy, shaggy bangs and several more inches.

28 of 35

ALI LARTER

It’s back to blonde for the Heroes star, who returned to her most recognizable look this week after a stint with sexy red.

29 of 35

VICTORIA BECKHAM

has her ups and downs – trying a high-piled updo at the British Fashion Awards and switching to a classic tousled bob days later in Paris.

30 of 35

CARRIE UNDERWOOD

The was all about cascading curls at the CMA Awards, before showing up at the CNN Heroes tribute show with a wavy shoulder-length bob.

31 of 35

AUDRINA PATRIDGE

“Filmed my last scene of 5th season today!!!…now at salon changing my hair!:),” Tweeted of going back to brunette after wrapping up The Hills. “Eventually ill do something completely different!” she continued. “i love change but for now takin it back to the dark side a bit.”

32 of 35

TAYLOR SWIFT

Bye-bye curls, hello bangs! The turned out in N.Y.C., replacing her signature ringlets with long straight hair and a shaggy fringe that got you buzzing.

33 of 35