The Spice Girls will receive $13 million each for their reunion tour. The band - Geri Halliwell, Emma Bunton, Mel Chisholm, Mel Brown and Victoria Beckham - are expected to announce details of the 25-date global extravaganza at London's The O2 next Friday.

A source told Britain's Daily Mirror newspaper: "This deal has taken years to sign off. But finally all of the girls are on board. It's going to be the most phenomenon pop event ever. No expense is being spared to make this an unrivalled spectacular."

Virgin records - the label behind the girls - will provide each band member with their own private jet for the tour. The Spice Girls, who shot to fame in the '90s and became one of the most commercially successful girl groups of all time with hits like "Wannabe" and "Viva Forever" have reportedly turned down reunion offers in the past, including one for $7 million each last month.

The source added: "The sum on the table is huge - but then it had to be to get the more reluctant members like Mel Chisholm to agree. She's been quite precious about her solo career and has always said she'd never get back with the girls. But with such a huge sum guaranteed, you can hardly blame her for finally caving in."

The tour will kick-off in London towards the end of the year, with shows across Europe, the Far East, the Middle East and the U.S. Organizers will take into consideration the girls' lives have changed immensely since they split in 2000.

Victoria, Geri and Mel Brown are all mothers, and Emma is due to give birth any day now.

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