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One of our favorite things about celebrity red carpet appearances has to be seeing what look they'll step out in next. Because when it comes to divas like Katy Perry or Nicki Minaj, you never know what color hair or lipstick they'll be sporting — and we're all for that level of spontaneity. Fashion is, after all, the ultimate form of self-expression. 

From Lady Gaga and Rihanna to Beyonce and Kylie Jenner, there's no shortage of dramatic A-list makeovers and chameleon-like transformations on this list. That's including a bleached-blonde buzzcut — hey, Kristen Stewart — and messy silver tresses on Cardi B: Okuuurrr! All of your favorite celebrity hair and beauty chameleons, ahead.