(digitalspy.co.uk) - Christina Aguilera has annoyed neighbours by making "sexy noises" in her swimming pool.The singer has upset residents near her $6 million Beverly Hills mansion by skinny dipping with husband Jordan Bratman late at night."They don't just splash around - they laugh, scream, swear and make sexy noises," a source told The Sun. "We're happy that they're happy, but we wish they would 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."Aguilera said earlier this year that she and Bratman would still be having "naked Sundays" to keep their relationship feeling fresh.