An onlooker told the magazine: "She was dancing on the tables trying to be really sexy, even putting a black sock over her head as a hat, and putting on a show for everyone."
Earlier in the evening Spears went to Beverly Hills Police Department to complain that a group of photographers were following her. No action was taken as a result of the complaint.
Los Angeles Superior Court Commissioner Scott Gordon yesterday ordered both Spears and Federline to complete a "parenting without conflict" programme and to stop making derogatory comments about each other.
Spears was ordered to undergo random drug tests after a former bodyguard said that he was worried about the use of drugs and alcohol within the singer's home.
