Christina Aguilera goes skinny-dipping with husband

Christina Aguilera and Jordan Bratman's marriage is still very much alive -- despite a new baby in the house.

The pair -- who welcomed their first child, Max Liron Bratman on January 12 -- are so determined to keep their two-year marriage red-hot that they've taken to skinny-dipping by moonlight.

The couple, who wed in November 2005, can be heard loudly frolicking in the pool of their $11.5 million Beverly Hills mansion around midnight.

"They don't just splash around — they laugh, scream, swear and make sexy noises," a source tells Star Magazine. "We're happy that they're happy, but we wish they'd keep it down a bit. There are a lot of old people who live around here, and they don't like noise after the dinner hour."

But their neighbors prefer Mr and and Mrs Christina Aguilera to the house's former owner, Ozzy Osbourne, adds the source. Ozzy — who sold the Mediterranean villa after wrapping up his MTV show, The Osbournes — would blast "horrific, ear-splitting rock music."