Madonna Broke her ankle before her world tour.

Pop Superstar Madonna, Who is currently 50 has injured her ankle just two weeks before her Sticky + Sweet tour kicks off in Cardiff, Wales, August 23. This tour has already sold all the tickets of the first 5 concerts.

She was photographed over the weekend nursing a heavily bandaged foot - prompting fitness fears for the first date of the tour. There are rumors of that she may not perform on the first day of the concert of the live World Tour.

The mammoth tour will see the singer-actor cover Europe and North America and will wrap up in Mexico City Nov 30. Madonna has also invited singer Britney Spears to appear on some of her world tour dates. Yes she wont be in the little black bikini as the last time.

Spears has also been asked to shoot a video for the tour that will be used while Madonna is performing on stage.