Rihanna spends £14,000 a week on her hairstyle!

'Umbrella' singer Rihanna is said to be spending £14,000 a week on one of Hollywood's leading hair stylists.

The 23-year-old singer pays top celebrity stylist Ursula Stephen £2,000 a day, to make sure she looks her best.

"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," the Daily Mail quoted one of her staff as saying.

"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," the staff added.

Rihanna has changed her hairstyle 13 times since it was dyed bright red last November, including a huge red afro that got her the nickname 'Side-Show Bob' after the Simpsons cartoon character.