Hair Evolution: Rihanna's Tress Tour

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The US leg of Rihanna's "Last Girl on Earth" tour ended this week, but she left plenty to discuss -- especially her hair. Throughout the tour, her tresses evolved from a cropped blond 'do to a fiery red, asymmetrical cut, to shaggy chic -- and finally to a long and curly mane. Take a look back at select scenes from the tour to see how her hair evolved.