CHRISTINA Aguilera is a mature, sexual woman. "I'm not the same person who released 'Genie' and then 'Dirrty,' " Aguilera told Nylon magazine. "I have this overconfidence with my sexuality because I feel empowered by it, and I love being in control of every facet of what I do." Aguilera is going to exert some of that control next Wednesday when she celebrates being on Nylon's cover for the mag's eighth anniversary party at the Gansevoort Hotel with her husband, Jordan Bratman, and some friends.