Stars like Cheryl Cole, Kim Kardashian and Beyonce have grabbed the hair dye more then once in an attempt to find out who really does have more fun. Join us as we take a look at some of the most drastic blonde-brunette hair changes in the industry.
The 'Problem' superstar is readying her brand new single 'Focus' - and has gone for a platinum blonde look for the relaunch! Looking good, lady! Picture: Getty