Best Girl Groups of All Time
Girl power! Debuting in 1994 with "Wannabe," the powerhouse group -- Mel C, Emma Bunton, Mel B, Victoria Beckham and Geri Halliwell -- became the best-selling female group of all-time. Haliwell left the band in 1998, but the five women reunited for a world tour in 2007. The British pop stars also performed during the closing ceremonies at the 2012 Olympics in London.