Sources say Chris Brown and Rihanna are still holed up at Diddy's mansion on Star Island in Miami. While there's been no sign of Rihanna, who insiders say flew by private jet from Mexico, several pictures of Chris, his friends and family have surfaced. Rumors that Chris had been seen partying around Miami with Khole Kardashian have been shot down by his people. Instead, they claim Chris' only outings have been late night studio recording sessions. Meanwhile, it's been reported that police found blood between the front seats of the car Chris and Rihanna were riding in the night of their fight. Chris' Mom