Geri Halliwell turns 50: a look back (20 images)

Singer Geri Halliwell, Goodwill Ambassador for United Nations Population Fund (UNFPA), listens to comments at the meeting of Goodwill Ambassadors and Messengers of Peace hosted by U.N. Secretary General Koffi Annan at the United Nations in New York City on June 18, 2002. Photo by Ezio Petersen/UPI

The Spice Girls, left to right, Emma Bunton (Baby Spice), Victoria Beckham (Posh Spice), Melanie Brown (Scary Spice), Halliwell (Ginger Spice) and Melanie Chisholm (Sporty Spice), arrive at the American Music Awards in Los Angeles on January 25, 1998. Photo by Jim Ruymen/UPI

Harry Belafonte, Danny Glover, Tetsuya Komuro, Feryal Ali Gauhar, Susan Saradon, Misako Konno, top, left to right, Halliwell, Muhammad Ali, U.N. Secretary General Kofi Annan, Sir Peter Ustinov, bottom, left to right, at a photo op after special U.N. session gathering most of the United Nations Messengers of Peace and Goodwill Ambassadors in New York City on October 23, 2000. The Spice Girls released their final album that year. Photo by Ezio Petersen/UPI

Beckham, Chisholm, Halliwell, Bunton and Brown, left to right, of The Spice Girls, announce their reunion tour at a press conference at O2 Arena in London on June 28, 2007. Photo by Rune Hellestad/UPI