The Spice Girls Reunite for World Tour
THURSDAY JUNE 28, 2007 09:15 AM EDT
By Pete Norman
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It's official: The Spice Girls really, really are getting back together.
The group will release a greatest-hits album and kick off an 11-show world tour in December, it was announced in London Thursday. (See a video below.)
The two-month tour will begin Dec. 7 in L.A. and include concerts in Las Vegas, New York City, London, Cologne, Madrid, Beijing, Hong Kong, Sydney, Capetown and Buenos Aires.
"We are celebrating the past!" said Geri "Ginger" Halliwell at London's O2 Arena, when she and

, Melanie "Scary" Brown, Emma "Baby" Bunton and Melanie "Sporty" Chisholm were introduced on stage together for the first time since 1998.
"I want to be a Spice Girl again," said Bunton. "We are like sisters and we have our arguments, but by the end of the day we get back together."
Actor Richard E. Grant, who played the group's manager in their 1997 movie
Spice World, introduced the band at the press conference after a video montage of their greatest moments played on screen.
The tour "will be a proper good farewell to our fans," said Chisholm, who had been portrayed in the British press as the last Spice to agree to a reunion. "A girl is allowed to change her mind," she quipped. "We only started serious discussions this year. We feel the time is right. I'm very, very excited."
"We are going to celebrate the past, do a small tour and that will probably be it," said Beckham, who had just returned from an Asian vacation with husband David after they

to their home in Spain on June 18. "Our priority is our families."
The Spice Girls first conquered the world after their Svengali manager,
American Idol creator Simon Fuller, launched their first catchy tune, "Wannabe" in 1996. But the group fired Fuller in 1997; Halliwell quit a year later and the remaining four parted ways in early 2001.
Sources first

about the reunion plans in early June.
The Girls have been busy lately: Brown

, Angel Iris, in April; Halliwell

, Bluebell Madonna, in May; and Bunton is

in August. Mother-of-three Beckham is moving to Beverly Hills on July 12 ahead of her

airing four days later.
Referring to the baby boom, Beckham added, "We will definitely have a huge creche on tour."