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While there are some celebrities whose hair colour has become their trademark (Jennifer Aniston, for one), others know that the key to keeping us on our toes is by mixing up their looks. Many throw in some highlights for the summer, and then some lowlights for the cooler months, but nothing impresses us like a full-blown colour transformation.
Whether it's because of a movie role, leaving behind a natural shade, or just having fun, these celebrities have dared to make the ultimate switch—blonde to brunette (or vice versa).
From celebrities like Margot Robbie who have briefly plunged into another hair hue, to the celebrities like Dakota Johnson and Zooey Deschanel who have adopted a new signature hair colour entirely, these are 30 celebrities who have seamlessly rocked both blonde and brunette locks.