According to Page Six, Rosie O’Donnell is going up against “Empire” diva Cookie — spies say O’Donnell’s already filmed an arc on the hit Fox hip-hop series. “Rosie’s been doing a stint on ‘Empire,’” said a source, adding she talked about the role Saturday night at a Gotham Comedy Club stand-up gig. “She’s playing a character, not herself,” the source said, “and she does have scenes with Cookie,” played byTaraji P. Henson. Guest stars on the show have also included Pitbull,Chris Rock, Ludacris and Kelly Rowland. During the act, O’Donnell also opened up about adopted teen daughter Chelsea’s recent scathing remarks about her. “At 18, they’re gonna rebel any way they can, any way they can get your attention,” she said.