EW YORK - Christina Aguilera has no problem showing skin - especially on weekends with her husband, music executive Jordan Bratman.

Christina Aguilera arrives at the Cannes festival palace in Cannes, southern France in this photo from Jan. 20, 2007. [AP]

"We claim ourselves to be the coziest couple ever. We have something called `naked Sundays,'" the 26-year-old pop star tells Ellen DeGeneres in an interview set to air Wednesday on "The Ellen DeGeneres Show."

"You have to keep marriage alive, spice it up," says Aguilera, who married Bratman in November 2005. So the couple stays in on Sundays, she says. "We do everything naked. We cook naked."

"You cook naked?" asks DeGeneres.

Aguilera replies: "Yeah, we cook naked."

"Nothing with grease - that could splatter," says DeGeneres.

"Well, unless you want the grease," Aguilera replies.