The Material Girl’s U.K. shows sold out within minutes, even when four more shows were added. Her U.K. itinerary is now expanded to seven shows, six at London’s Wembley Arena.

North American tickets went on sale today and fans on this side of the pond have been equally enthusiastic. Many dates sold out immediately and additional shows have been announced for a number of cities, including Montreal, Boston, Miami, Los Angeles and New York. Four nights are now planned for NYC’s Madison Square Garden.

Several days earlier, Chicago’s United Center and Fresno, Calif.’s Save Mart Center each added a second gig.

Madonna’s itinerary now spans nearly 40 dates, with concerts in North America and Europe booked from late May through early September. Prior to the tour launch, she’ll appear at the Coachella Valley Music & Arts Festival in Indio, Calif., April 30.