PARIS Hilton had better hope she stays sick. The celebu-con is getting the princess treatment in the medical wing of the Century Regional Detention Center. Her fellow pokeymates say most inmates "have to be bleeding from their eyes" to get into the eight-bed ward, but Hilton was whisked straight into a private room where she sleeps on a comfortable hospital bed and sups on roast beef, spaghetti and meatballs, chicken nuggets and fish. "You know, Lean Cuisine style," a recently released inmate told The Post's Marianne Garvey. She also has a television and is allowed to watch DVDs. If she were in the prison's general population, she would surely sprout "commissary berries" - inmates who glom on to anyone with a little cash who could buy them a $1.50 cheeseburger or an 87-cent Milky Way bar. "If she were with us, somebody'd be pushing up on her," the inmate said. A jail spokesman said Hilton would remain in segregated custody until her undisclosed medical condition has been resolved - "Were taking it day by day."