A posting at the Girls' website, which calls the tour "a once in a lifetime opportunity" and "the last chance to dance," says more dates may be added. The site includes a ticket-registration form. "To make it fair, we will randomly pick who gets to buy tickets," it says.

The Spice Girls--Geri "Ginger" Halliwell, Victoria "Posh" Beckham, Melanie "Sporty" Chisholm, Emma "Baby" Bunton and Melanie "Scary" Brown--burst onto the scene in the mid-'90s, topping charts with the song "Wannabe." They went on to sell 55 million albums, according to reports.

Halliwell left the group in 1998 and the remaining four parted ways in 2001. But they were all chummy today (6/28) during a press conference at London's O2 Arena.

"Imagine you got divorced and you've got back together with your ex-husband," Halliwell said in explaining how she felt about the reunion, according to the Associated Press.

"She just appreciates the fact we've let her back in," Beckham joked.

Chisholm said the tour is about saying thank you to supporters and that it would be a "proper good farewell to our fans," according to reports.

Hitting the road will certainly be a different experience for the Spice Girls these days, as there will be seven children among them once the tour launches. A very pregnant Bunton is reportedly scheduled to give birth in August.

In conjunction with the outing, EMI is expected to release the first Spice Girls greatest-hits album in November, and the group is also planning its first official documentary for TV broadcast, according to AP.