Geraldine Estelle Halliwell, probably best known as former Spice Girl, Geri Halliwell has achieved a lot more than being one of the top selling recording artists in the 1990s with the girl group the Spice Girls, which became one of the most successful girl groups of all time, selling in excessof 55 million records worldwide. As well as being a suceessful singer, Geri is a songwriter, children's author, actress and Goodwill Ambassador for the United Nations Population Fund.