NOBODY can control Britney Spears. Now she's taken over as her own business manager and publicist. Though she's still signed to Jive Records, a source told Page Six, "She is doing all of her own business now." Our spy saw Spears at Aspen on West 22nd Street yesterday afternoon "signing contracts" - possibly related to the recent deal she inked to open a Las Vegas club. The messy mother of two recently cut ties with her manager Larry Rudolf, her mother, and her publicist.