LONDON (Reuters Life!) - The Spice Girls announced extra dates for their comeback world tour on Friday after more than three million fans registered for tickets on their Web site.

The reformed pop group -- Posh, Ginger, Sporty, Scary and Baby -- will play three extra concerts in Shanghai, Vancouver and San Jose, California.

The 14-city tour starts in Canada on Dec. 2 and ends on Jan. 24, 2008 in the Argentine capital, Buenos Aires.

"In true 'Girl Power' tradition, we are taking over the world again," the band said in a statement. "As our own VB (Victoria Beckham) would say -- that is major."

The Spice Girls, whose hits include "Wannabe", "Spice Up Your Life" and "Say You'll Be There", announced their reunion tour at a news conference last month.

The band, which sold 55 million albums around the world, split up in 2000, two years after Geri Halliwell left.