Demi Lovato
The former X Factor judge is not afraid of color when it comes to her hair, recently changing her blue strands into pink.
Sienna Miller
The star ditched her blonde locks for a new red hue, which she debuted while on vacation with her family in Mexico.
Crystal Harris
Hugh Hefner's wife decided to change things up with a glossy ombre look. But she quickly switched back to blond at her hubby's request.
Katie Holmes
Similar to Kate Middleton, Suri's mom debuted a darker chocolate shade in December 2013.
Kim Kardashian
The hot mama debuted golden blond locks while stepping out with baby North for a friend's barbecue in September.
Kate Mara
The House of Cards star took her normally auburn locks to blond—is it possible she's gone lighter for a new role?
Johnny Depp
The actor dyed his brown mane to a brash blond shade, debuting the look at a London Film Festival event honoring actor Christopher Lee.
Bryce Dallas Howard
The former redheaded actress showcased a sexy brunette bob at the Los Angeles Thanks for Sharing premiere in September.
Jessica Alba
Alba rocked slightly shorter and lighter locks earlier this season—and we love the look!
AnnaLynne McCord
The actress transformed her beachy blond waves to a grown-up brunette style in September.
Vanessa Hudgens
The star showed off her new ombré locks—compliments of Nine Zero One Salon in West Hollywood—while out and about in Los Angeles.
Gabrielle Union
Looking good, Gabrielle! The actress showcased lighter locks on her Instagram account with the caption: "New Day, New Job...New Do."
Shay Mitchell
The Pretty Little Liars star shared pics of her fresh blond highlights on Instagram with a shout-out to the stylist: Hollywood highlights expert George Papanikolas.
Chrissy Teigen
The sexy model posted an Instagram shot of her newly ombré locks, courtesy of colorist and celeb hair guru Tracey Cunningham.
Rihanna
Never one to shy from experimentation, the songstress recently changed her hair from a warm copper to a cool black coif with gray highlights.
Anne Hathaway
The Oscar-winning actress switched her cropped locks from deep brown to platinum blond earlier this year for the 2013 Met Gala—but she's since gone back to brunette.
Sofía Vergara
The Modern Family actress posted a sultry selfie on Instagram of her newly lightened locks mere minutes after leaving the salon.
Minka Kelly
The actress saw colorist Tracey Cunningham—who also worked with Chrissy Teigen and Drew Barrymore this summer—to take her normally brunette locks into blond territory.
Demi Lovato
The singer went blond in May and took her hair a few shades lighter only three weeks later!
Drew Barrymore
The actress looks rocker cool with a blond 'do she debuted in April 2013.
Carly Rae Jepsen
The singer tweeted a pic of her fiery auburn locks to fans in May.
Emma Stone
The actress went from red to blond and back to red again—and we have to admit, she looks great either way.
Dianna Agron
Another blond to red and back again story! The Glee actress switched to her preferred golden locks in June.
Emma Roberts
The American Horror Story: Coven actress showed off her lightened 'do to Twitter followers in July, tweeting "Time for a change. Blondes have more fun."