Britney SpearsBritney Spears hid her newly shaven head under a cheap looking blonde wig but kept partying over the weekend.

Britney was spotted wearing the wig with a bikini for a spot of pool-side sunbathing (and chain-smoking) at the Mondrian Hotel in Los Angeles on Sunday afternoon then gathered a group of friends together for a night out at Roxy in West Hollywood last night.

A fellow clubgoer reported: “It was a shock to see her in a wig after what she had done to herself.”

“While she was in the club she kept going to bathroom all the time, which was weird.”

Britney only stayed at the club for about 45 minutes after taking offence when the DJ played one of her songs in her honour. Her group then headed over to the exclusive Polo Lounge at the Beverly Hills Hotel.

On her way between clubs, a photographer asked about her remarks at LAX earlier in the day on Friday when she said she was planning to keep her brown hair colouring for a while. She just shouted back “I lied”.

According to the New York Post, a source in Las Vegas has claimed Britney’s hair was badly damaged from repeated colouring, bleaching and extensions. Britney visited a salon at the Palms hotel and casino during a recent visit to the city and staff found her hair had broken off and thinned to the point that “bald spots had begun to appear”.

Another source told the newspaper that Britney’s decision to shave off her head was an act of rebellion against her mother who is begging Britney to enter - and stay in - rehab.