R+B star Chris Brown is such a huge fan of Rihanna's smash hit UMBRELLA he has paid for studio time to remix the track. The singer begged Rihanna to let him revamp the hit, and then went ahead with his plans while he was awaiting her OK and she's thrilled with his efforts, which he has dubbed Cinderella. Rihanna says, "He was very anxious, he wanted to do it from the beginning. He said, 'I wanna remix Umbrella,' and he just kept asking me and asking me. "Then one day he just called me; he was in the studio and he said, 'I'm remixing Umbrella right now!' and he just did it. "He paid the engineer, he paid for his own studio time, he did it."