Celebrity Hair: Miley Cyrus, Beyonce

01 of 17

MILEY CYRUS

Whether you loved it, hated it or thought it looked vaguely familiar, Miley's platinum cut was arguably the most buzzed about hair tranformation of the year.

02 of 17

BEYONCé

You know you're a star with a capital "S" when anything you do – from giving birth to changing your hair – is major news. Such was the case when Blue Ivy's mom debuted blunt bangs in early November.

03 of 17

NATALIE PORTMAN

After taking a hiatus from Hollywood to focus on motherhood, Natalie shocked fans when she returned to the red carpet with blonde hair in September. But don't get too attached to her lighter look – it's for a movie role.

04 of 17

JENNIFER LAWRENCE

Like Natalie, Jennifer made a major color change, swapping her honey locks for a striking dark chocolate hue, reportedly for a movie role. Lucky for her, she looks equally beautiful as a brunette.

05 of 17

KATY PERRY

For someone who's tried out nearly every hair color including pink, purple and blue, it felt almost anticlimactic when the pop star dyed her mane basic black.

06 of 17

KELLIE PICKLER

Best friend of the year award goes to the country star who shaved off her long blonde locks (we're talking a buzz cut!) in support of her best friend who was diagnosed with breast cancer and had to undergo chemotherapy.

07 of 17

RIHANNA

It was no surprise that Rihanna upstaged everyone at this year's MTV Video Music Awards. Only this time it wasn't for her performance. It was her new jet-black pixie that stole the show. (Prior to the 'do, she had waist-length waves.)

08 of 17

ANNE HATHAWAY

We're dubbing 2012 the year of the pixie because Anne was yet another star who chopped off her hair. And even though she did it for her role in Les Misérables, the star plans to keep the style well into 2013 because she loves the look that much.

09 of 17

DEMI LOVATO

Demi changed her hair this year almost as much as we changed our manicure: After going blonde, then getting dip-dyed pink tips, followed by bangs, and then finally back to blonde again, the X-Factor judge decided to end the year as a brunette, her natural color.

10 of 17

BRITNEY SPEARS

Though it may not be the most shocking hair change for the star (Remember her shaved head?), the X-Factor judge did try something new: She donned rainbow dip-dyed tips for a week then ditched that trend and got bangs instead.

11 of 17

LADY GAGA

We barely blink when Lady Gaga changes her hair, because shocking is the norm for her. But our jaws hit the floor when the superstar showed off a pretty chestnut color – one that we hope sticks for 2013.

12 of 17

ALICIA KEYS

Alicia, who released her fifth album this year, Girl On Fire, traded her shoulder-length curls for an edgy, sleek chin-length bob.

13 of 17

LEIGHTON MEESTER

The Gossip Girl actress didn't waste anytime saying bye-bye to Blair Waldorf. Just a week after the show wrapped filming its final episode, Leighton got rid of her character's trademark waves for a choppy above-the-shoulder look.

14 of 17

KELLY CLARKSON

New body, new man, new 'do! Kelly Clarkson gave herself a complete makeover this year – hair change included. She lightened her signature dark brown tresses to a blondish-caramel color.

15 of 17

MARY-KATE OLSEN

After she started dating 42-year-old Olivier Sarkozy, Mary-Kate decided to go for a more mature look, darkening her blonde hair to a rich, deep brown.

16 of 17

JESSICA BIEL

The new Mrs. Timberlake kicked off 2012 with a bang – literally. She tried the hot trend back in January, and kept the style all year long. However, she swept them to the side for her wedding.

17 of 17

ROBERT PATTINSON

We're pretty sure Twilight fans mourned when Rob shaved off his character's signature tousled hair at the beginning of the year, but luckily (and probably contractually) the star grew it back just in time for the Breaking Dawn – Part 2 press tour.