Cheryl Cole is set to spend around £40,000 on alcohol for her birthday party.

The Girls Aloud singer - who turns 28 today (30.06.11) - will put her credit card behind the bar for the extravagant bash at a secret London location tomorrow (01.07.11), and she will be sporting a new blonde hairstyle for the occasion.

A source close to the star told the Daily Mirror newspaper: "Cheryl wants Friday to be her big return to the limelight, and she will be making a dramatic entrance.

"Her dress is all sorted, and she's had her hair done especially. She's in a great place, finally, and is ready to let her new hair down.

"Cheryl will put her credit card behind the bar - around £40,000 worth of champagne and spirits will be flowing through the night.

"She hasn't had a drink in nearly three months and will be going for it on Friday. She'll be the first on the dance floor and one of the last to leave. She really can't wait and is determined to show people she's happy and over the 'x factor' fiasco."

To honour the 'Parachute' singer's new look, there is set to be a blonde theme to the evening, which will feature guests including her Girls Aloud bandmates and the group's former manager and 'X Factor judge Louis Walsh.

The source added: "It will be a very glitzy occasion but in impeccable taste. Cheryl thought it would be a funny idea to have a blonde theme in light of her new hair."

Cheryl - who has not been seen in public since being sacked from the US 'X Factor' last month - was spotted in London's Mayfair yesterday (29.06.11) looking happy and speaking to US embassy staff.