The 26 year-old star shared her secret during an interview with television hostess Ellen DeGeneres. "We have something called naked Sundays," revealed the singer.
"You have to keep marriage alive, spice it up," added Aguilera. "[In November] we just celebrated our first anniversary, and on Sundays we just do everything in the house, and we’re just cozy and laid back," she says. "We don’t need to go anywhere, we’re just with each other. We do everything naked."
