As the Spice Girls get ready to kick off their world tour in Vancouver this weekend, one member of their entourage seems to be missing: Geri Halliwell's 18-month old daughter Bluebell.

It appears that a case of the chicken pox swept through the posse of Spice Girl offspring, and Halliwell admits that her daughter probably caught the virus from Posh Spice's son.

"Bluebell caught the chickenpox from Cruz," Halliwell told British TV show GMTV. "She's not completely pelted now so I left her at home. Normally their running around the set."

Between the four moms on the Spice Girl tour there are seven children to keep track of. Victoria Beckham, 33, has three sons, Brooklyn, 8, Romeo, 5, and Cruz, almost 3; Emma Bunton, 31, has one son Beau, born in August; Mel Brown, 32, has two children, Phoenix Chi, 8, and Angel, born in April, while Halliwell has 18-month old Bluebell.

The "Girl Power" moms enjoy having their children around the set and Halliwell says that daughter Bluebell "loves hanging out with the Beckham boys."

"Cruz and Bluebell have play dates, and Romeo - well, he is just gorgeous with her," said Halliwell. "Actually, it was a beautiful moment when we were rehearsing the other day and all of our kids were playing on the stage at the same time. It made me smile."

The highly anticipated world tour will include 40 show dates and has already sold an estimated 750,000 tickets.

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