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.
In March 2010, vocal coach and singer Carrie Grant announced on ITV1's The Alan Titchmarsh Show that Halliwell would be making a return to music. The following month, Halliwell announced through her official website that she was back in the studio and recording. In 2010, Halliwell stood in as a guest judge on The X Factor for Dannii Minogue at the Glasgow auditions.
Halliwell is to release her own range of bikini's through retailer Next in January 2011.
