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Blue Mood - From reality TV starlet to running three successful clothing lines, Nicole Richie has had quite the run, and she’s given us some truly amazing hairdos every step of the way. Because we love a girl who loves to switch it up, we’re giving you a closer look at the star's mane story so far. By Britt Middleton Promoting her new reality series, Candidly Nicole, on Good Morning America on July 7, Nicole gave us a new shade to admire: cotton candy blue! She has said her technicolor looks of late came at the request of her six-year-old daughter, Harlow.  (Photo: PacificCoastNews)

Photo By Photo: PacificCoastNews

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Ultraviolet - The fashion designer made a splash earlier this year, debuting her freshly dyed violet locks on Instagram. The look is bold and spunky, and if you ask us, so very Nicole. (Photo: Nicole Richie via Instagram)

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Pretty Young Thing - How sweet are those curls? Even as a young tot, Nicole, daughter of pop star Lionel Richie, had serious style. (Photo: Nicole Richie via Instagram)

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Wild Child - Flash forward to 2003, and it was clear Richie was ready to break-free from the frilly bows and Sunday dresses. As Paris Hilton’s sidekick on the reality TV series The Simple Life, Richie oozed attitude with her bleached roots and stripy, black and red extensions.(Photo: Giulio Marcocchi/Getty Images)

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Flipping Out - By 2005, she swapped her extensions for a feathered honey blonde bob with lots of volume. The whole look gives us a ‘70s vibe, and we love it. (Photo: Frederick M. Brown/Getty Images)

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Fringe Benefits - Following her DUI arrest in December 2006, 2007 was a year of renewal for Richie. She grew out her buttery blonde locks and added some fresh fringe. That summer, she announced she was expecting her first child, daughter Harlow, with then-boyfriend Joel Madden. (Photo: David Livingston/Getty Images)

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Dark and Lovely - After welcoming her second child, son Sparrow, in 2009, the fashionista refreshed her mommy style with a dark chocolate hue and beachy waves.(Photo: Jason Merritt/Getty Images)

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Shine On - Back to blonde, the star proved in 2011 that she’d never met a headband she didn’t like. Richie was often spotted in her ornate head pieces from her own House of Harlow 1960 line. (Photo: Noel Vasquez/Getty Images for The Beverly Center)

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Golden Girl - While we love her signature boho chic style, we think she nailed her soft, Old Hollywood-inspired curls at the 2013 Golden Globe Awards.  (Photo: Jason Merritt/Getty Images)

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Punky Reign - At the 2013 Met Gala, she rocked the punk-themed red carpet in a platinum bouffant and wine-stained lips. It doesn’t get more punk rock than this.(Photo: Jamie McCarthy/Getty Images for The Huffington Post)

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Braided Up - She stepped out at the LACMA 2013 Art + Film Gala in a stunning retro-inspired fishtail braid sure to make our best-style list for years to come.  (Photo: Frazer Harrison/Getty Images)

Photo By Photo: Frazer Harrison/Getty Images

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Oh She Glows - Before going purple recently, Richie rocked a bronzy-brown hue with subtle blonde highlights, which set her olive complexion off beautifully, and a sleek angled bob. We can't wait to see what this style chameleon tries next.  (Photo: Astrid Stawiarz/Getty Images for Mercedes-Benz Fashion Week)