Girls Aloud star Nicola Roberts has celebrated her 23rd birthday with a party in London.

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Nicola was joined by her bandmates – Sarah Harding, Cheryl Cole and Kimberley Walsh – for the party in London’s Wellington Club on Saturday (04.10.08), although Cheryl left the party early after nursing a single cocktail for two hours.

Nicola, who turned 23 yesterday (05.10.08), certainly made sure she enjoyed her night in the upmarket Knightsbridge area of the city.

A source told the Daily Mirror: “Nicola was certainly the belle of the ball. So many different men were coming on to her, and she didn’t mind because she was pinching their bums, too.

“She pulled off one man’s hat and put it on her head backwards, then jumped on another guy and rode him piggy back.

“Then when she was dancing a bit later one of her boobs popped out of her dress. Her friend was frantically chasing her around the dance floor trying to put it back.”

Razorlight rocker Johnny Borrell and comedian Alan Carr were also in at the party, which went on until 4am.

Nicola was last spotted being helped out of the club by her mother, apparently saying: “Get me out of here – I’m going to pass out.”