A Rainbow of Star Hair Colors

Color chameleon Rihanna first revealed her crimson-hued hair via Twitter while working on the music video for her single “SampM” last January.

Paramore frontwoman Hayley Williams has experimented with a spectrum of punk colors from platinum blond to purple. At the 2011 Grammy awards, Williams showed off a bold tangerine shade-with lips and eyebrows to match!

Lady Gaga endures a double-process treatment that strips the natural color-she was born a brunette-from her tresses and replaces it with her color du jour. At the 2010 Grammys, Gaga added a lemon-yellow layer to her platinum strands for added effect.

Thanks to her extensive collection of wigs, Nikki Minaj can transform her hairstyle in just minutes. Last November, the singer paired her mint-green locks with a bright pink hoodie for an eye-catching red carpet look.

From the MTV Music Awards to Paris Fashion Week, Katy Perry has proved that she can rock blue hair anywhere.

In 2010, Kelly Osbourne turned heads when she dyed her hair a lovely shade of lavender.

In 2007 Rachel McAdams experimented with pink highlights. "People like Lady Gaga and Avril Lavigne added pink accents too, but I like to think Rachel was the first," the actress' makeup artist and sister, Kayleen, told InStyle last year.

Why choose one color when you can have them all? At the BRIT Awards in February, pop singer Avril Lavigne added some extra edge to her ensemble with pink, yellow, blue and green highlights.

She may have been the lead singer of Blondie, but music icon Debbie Harry had a white out at the 2010 GQ Gentlemen's Ball, rocking a snowy wig on the black carpet.