LATEST: Spice Girls star Emma Bunton is being treated by David Beckham's physiotherapist in a bid to get fit for the band's comeback U.K. concert. The singer took a tumble onstage at the Mandalay Arena in Las Vegas on Tuesday (11Dec07), twisting her ankle, and has been on crutches ever since. But Bunton, 31, is determined to perform when the group play their first date at London's O2 Arena this weekend (15Dec07) and has resorted to therapy from the medic favoured by bandmate Victoria Beckham's soccer star husband. She says, "It was very embarrassing. I'm seeing David Beckham's doctor and praying it will be fine for Saturday. I'm keeping my fingers crossed." The Spice Girls' world tour will see the group play 17 shows in the British capital in January (08) - and conclude with a second leg in North America.