The singer is normally chauffeured around but was happy to take the Jubilee underground line to get to her own gig at London's O2 Arena. RiRi chatted to fans and posed for pictures as she stood in the packed carriage accompanied by her massive entourage. 'Fans couldn't believe they were sharing a carriage with a world famous pop star. 'She was just like any other passenger, except accompanied by a huge entourage. She was happy to pose for snaps and talk about the gig. She was so down to earth. The diva got out at North Greenwich station and hopped into a car, which was waiting for her. She then drove her just 100 yards to the backstage area, where she later wowed the audience.