London: R&B star Rihanna reportedly spends a whopping 14000 pound a week on her hair stylist to get that perfect look.

The 23-year-old singer's stylist, Ursula Stephen, charges 2,000 pounds a day to help ensure she looks her best, reported Daily Mail.

"Rihanna likes to pioneer new styles but it's costing her a fortune. She makes several public appearances a week, and the cost soon stacks up," says one of her entourage.

"Ursula is a close confidante and they are together all the time. You have to wonder why she insists on keeping such an expensive member of her entourage on the payroll 24/7. Most of these costs are paid for by her management," another source said.

Rihanna has changed her hairstyle 13 times since it was dyed bright red last November, which also earned her the nickname 'Side-Show Bob' after the 'Simpsons' cartoon character.