Rihanna becomes Sugababes’ fourth member

[an error occurred while processing this directive]Washington (ANI): Singer Rihanna has become a mentor to English girl pop group the 'Sugababes". The group, which involves Keisha Buchanan, Heidi Range and Amelle Berrabah, calls the 'Umbrella" girl as 'fourth member' of their group.

"Every time we're gonna hook up (with Jay-Z) he's off partying with Diddy or someone, but Rihanna has been a huge help to us," Contactmusic quoted Buchanan as saying. "She's been like our fourth member, listening to all our songs and saying what she liked and what she didn't," she added.