Geraldine Estelle "Geri" Halliwell

• 2007–2009: Spice Girls re-union and Ugenia Lavender
On 28 June 2007, Halliwell announced she was joining her former group-mates for a concert tour "Return of the Spice Girls". Part of the setlist of the reunion tour features Halliwell performing solo, singing her cover of It's Raining Men. It was announced on 1 February that the tour would end early, on 26 February 2008.
On 12 April 2007, it was announced that Halliwell had signed a six-book deal with Macmillan Children's Books. The books follow the adventures of nine-year-old Ugenia, a character based on Halliwell, alongside her friends Bronte, Rudy and Trevor. Other characters are said by Halliwell to be loosely based on Gordon Ramsay, George Michael, Marilyn Monroe, Vincent van Gogh, Wayne Rooney and the character Justin Suarez from the TV series Ugly Betty. The character Princess Posh Vattoria, a caricature of Halliwell's bandmate Victoria Beckham, was featured in early drafts but has not appeared in the book series.
Halliwell appeared in the film Crank: High Voltage alongside friend, actor, John Damon and on the BBC 1's The One Show on 7 May 2009. On 24 May 2009, she spoke to the Speed TV reporter Peter Windsor in the pit lane just prior to the start of the 2009 Monaco Grand Prix. In interviews to promote the book series Ugenia Lavender, Halliwell said she had no plans to return to a solo musical career in the near future.