Pop singing star Madonna's upcoming world tour has been thrown into jeopardy, the icon has reportedly injured her ankle, and only just two weeks before her live shows kick off. Madonna is currently in New York City rehearsing for her Sticky and Sweet tour, which will begin in Cardiff, Wales, on August 23. And she was photographed this weekend nursing a heavily bandaged foot, prompting fears that the 49-year-old may not be fully fit for the first date of the tour. The concert tour will cover Europe and North America and will wrap up in Mexico City on November 30.