Tickets for Madonna's forthcoming shows at New York's Madison Square Garden sold out in just ten minutes. The singer's 'Confessions' world tour, which is named after her number one album Confessions On A Dancefloor (Ringtones), starts in Los Angeles on May 21 and demand is so far outstripping demand.

The 47-year-old songstress announced 40 shows in 21 venues around the world and has sold out all seven shows at London's Wembley Arena, four concerts in Paris, plus all dates in Miami, Montreal, Chicago and Los Angeles.

A spokeswoman for Madonna said: "It's incredibly exciting and Madonna's very pleased with the response."

Fans who have missed out on tickets now face being ripped off on a host of websites if they want to see their idol. Tickets for Madonna's opening show in Los Angeles are already fetching $1,000 a pair on some sites. The Hung Up singer's last tour pocketed her around $80 million but her latest string of dates are set to earn her even more.