CHRISTINA Aguilera has no problem showing skin — especially on weekends with her husband, music executive Jordan Bratman.“We claim ourselves to be the coziest couple ever. We have something called ‘naked Sundays’,” the 26-year-old pop star, pictured below, told Ellen DeGeneres on Wednesday’s 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 said. “We do everything naked. We cook naked.”

“You cook naked?” asked DeGeneres.

Aguilera replied: “Yeah, we cook naked.”

“Nothing with grease — that could splatter,” said DeGeneres.

“Well, unless you want the grease,” Aguilera replied.