Initial ticket sales for Madonnna's upcoming Confessions tour have been predictably huge, with shows added in several cities and virtually all dates selling out.

The tour, which begins May 21 in Los Angeles, has sold out four shows in Paris at Bercy Stadium beginning Aug. 27, seven shows at London's Wembley Arena beginning Aug. 1, two shows at the 40,000-capacity Amsterdam Arena beginning Sept. 3, and four shows in New York's Madison Square Garden beginning June 28, as well as doubles in Los Angeles, Montreal, Miami and Chicago.

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