Rosie O’Donnell was refused entrance to Sean “Diddy” Combs’ New Year’s Eve party on Miami’s Star Island for turning up with a large entourage. Diddy had personally invited O’Donnell. But sources tell us she rolled up casually dressed with six people in tow, and Diddy’s security wouldn’t let them in. O’Donnell left the Ciroc bash while Rihanna, Vivica Fox, Nelly, Matt Kemp, Robin Thicke and Paula Patton partied inside. Diddy’s rep confirmed the incident, but added he was “completely unaware” of the door drama at the time. We’re told he feels “terrible” about it. O’Donnell’s rep declined to comment.