Halsey
Feeling blue! The songstress rocks the perfect summer look while touring in Germany.
Kylie Jenner
Pretty in pink! The reality star goes pink in New York City.
Kelly Osbourne
The reality star wears a purple mohawk in New York City.
Bella Thorne
The actress tries a mermaid look in Los Angeles.
Tori Spelling
The actress goes Purple in Los Angeles.
Hayley Williams
Going green! The frontman of Paramore rocks a green look while touring.
Dakota Fanning
The Twilight star shows off a few strands of pink hair while on a coffee run in New York.
Hayden Panettiere
The petite star weaves an unexpected pop of purple into her braid while out and about in New York.
Helen Mirren
The Hitchcock star shows off her newly pink 'do at the 2013 BAFTAs.
Avril Lavigne
The "Complicated" singer shows off her new pink and green locks (and partially shaved dome!) during New York's Mercedes-Benz Fashion Week.
January Jones
The Mad Men star proves she's not her buttoned-down Betty character with some voguish (but still ladylike) pink streaks.
Ashley Tisdale
The Tiz's dark fuschia tips are totally cute, right?
Willow Smith
Will and Jada's risk-taker 11-year-old daughter dyes her short 'do a shocking green.
Selena Gomez
This Disney darling always keeps up with the trends, going for blue and purple streaks in her brunette locks.
Rihanna
From black to blonde to crimson, Ri-Ri's sported a spectrum of colors, but is she better off red?
Kate Bosworth
Blue crush, indeed! The actress opts shows off a baby-blue hue for a Coldplay show in La-La Land.
Snooki
Taking a page out of Rihanna's fashion look book, the Jersey Shore guidette trades in her signature poof for red streaks.
Dakota Fanning
Too cute! The NYY freshman looks adorable with her pink-tipped hairdo.
Kelly Osbourne
From grey to pale purple, the Fashion Police host is all about hair experimentation lately.
Dianna Agron
This Glee starlet dyed her coif a shocking hot-pink shade for a storyline on her hit show, but the hue was short-lived.
Katy Perry
After rocking a lot of wigs, the singer finally took the plunge and just dyed her hair this adorable lavender color.
Sienna Miller
Just before the British actress and fashionista announced she was pregnant with BF Tom Sturridge's baby, she added pale pink highlights to the tips of her blond locks.
Lauren Conrad
L.C. was so excited about her pink poof, she tweeted this close-up of her new shade.
Lady Gaga
There's blond hair and then there's neon-yellow hair! Of course, the Born This Way's gonna go with the outrageous shade.