Blonde is so… expected. Two-toned shades are so winter 2011. The hair color of choice this spring is red, and celebrities are testing out the full spectrum from dark auburn to light ginger to blazing scarlet. The attention-getting hue is notoriously hard to maintain, which may be why stars seem to dip in and out of redheadedness. Since we don't know how long it will last, here's a look at the fiery newcomers and the classics who undoubtedly inspired them.
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