Britney Bed And Bath

September 16 2004, 11:59 pm

Pop tart Britney Spears finally checked out her palazzette at Boston's Onyx Hotel yesterday, quietly slipping into town with fiance Kevin Federline after her much-ballyhooed Big Apple perfume launch.

``I can tell my mother designed this,'' the oft-barefoot songbird said as she walked through the door of the $259-a-night Britney Spears Foundation Room and bounced on the bed. ``It's got my mother written all over it.''

But it was Brits - not mum, Lynne - who signed the wall of the 10th-floor room decorated in soothing tones of beige and sage and outfitted with photo of Spears sporting a halo and a bra.

And Lynne's kid recognized one of the fairy tchotchkes in the room's curio cabinet as a previous inhabitant of her childhood bedroom in Louisiana. (A portion of The Foundation Room revenues are donated to the annual Britney Spears Camp for the Performing Arts on Cape Cod and other Foundation activities.)

After the future Mrs. Federline's quickie look-see - a tour she's been scheduled to take since May - she fled Boston at 3:30 p.m. on an American Airlines flight back to La-La. We hear Brits reserved the entire first-class section. Thanks affiliate britneyspears.org