Britney Spears is planning a week of raunchy London parties.

The 'Womanizer' singer - who kicks off the UK leg of her 'Circus' tour at the city's O2 arena tomorrow (03.06.09) - has hired naked acrobats, topless burlesque performers and dancing dwarves to perform after each of her eight shows.

Minutes after the 27-year-old star finishes her last racy number, Club Dada will open at the arena's indig02 venue.

By the time Britney arrives, the party is expected to be in full swing, and is likely to continue until the early hours of the morning.

A source said: "It's going to be crazy. Britney wanted to throw parties people will be talking about for years. I promise you, you've never seen anything so explicit in your life."

'The Circus Starring Britney Spears' is the singer's sexiest tour to date.

The show - which received rave reviews across the US - features skimpy costumes, seductive dance moves, whips, latex and blindfolds.

A friend of Britney's recently revealed the star's demands for her trip to the UK.

Britney has reportedly asked London's Dorchester Hotel for a room which has never been smoked in, several humidifiers, Marilyn Monroe DVDs, 100 watt light bulbs and a stripper pole.

She has also asked for fresh flowers, celebrity magazines, women's novels, tickets for West End theatre productions, a place to horse ride and a map of running routes around the nearby Hyde Park.

Britney will perform eight London shows between June 3 and 14 before the tour moves onto Manchester, Ireland and France.