Rihanna switches her hairstyle on a weekly basis. If Rihanna wants her hair red that night? It gets dyed. If she wants a pixie crop? Out come the scissors.
So - who's the woman behind the singer's ever changing hair? Meet Ursula Stephen, aka the busiest hairstylist ever. Watch below to hear her talk about what it's like to work with one of the most famous girls on the planet...