When it comes to hair, 2015 was arguably the craziest year. From rainbow and glitter roots to galaxy hair, girls (and dudes!) went above and beyond! Check out the 15 wildest hair trends we've seen in the last 365 days.

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10 "Sand Art" Hair Color Looks That Will Make You Join Team Unicorn: The rainbow hair trend shows no sign of slowing down anytime soon — especially not with this latest take on the look.

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