Madonna's upcoming Confessions summer (06) tour is proving to be one of the world's biggest tickets - 29 dates are sell-outs. The pop superstar's seven night stint in London and four nights in Paris, France were among the first shows to sell out, along with dates in New York, Amsterdam, Montreal, Los Angeles and Las Vegas. The tour is on course to become Madonna's biggest ever - her 2004 Re-Invention trek drew nearly a million fans and grossed $125 million (GBP71.4 million).