From blonde to brunette and back again! See before and after pictures of Kim Kardashian, Margot Robbie, Kate Bosworth, and more stars with dramatic hair color makeovers
Sometimes a subtle hair color change can be just as dramatic. Case in point: The Oscar winner's makeover from light brown to a richer color in November 2013. "Natalie is a natural brunette, so her color within these tones will always work," says Tresch. "Her darker look is sleek and a little more mature."