Brisk sales for Madonna [ tickets ]'s upcoming "Confessions" tour have led to repeat engagements in a number of cities, tickets for which will hit the box office during the next few days.

New to Madonna's itinerary are third nights in the Los Angeles area and Boston, and second nights in Las Vegas, Philadelphia and San Jose, CA. Tickets for the L.A.-area and San Jose concerts go on sale Friday (4/21), while those for the Las Vegas date are scheduled for release on Saturday (4/22). Those for the new Boston and Philly stops, meanwhile, are tagged for a Monday (4/24) on-sale.

As previously reported, Madonna [ tickets ] has also added to her tour route a fifth performance at Madison Square Garden and a second show in Hartford, CT, tickets for both of which are on sale as of Friday (4/21).

The tour itinerary and available on-sale information is shown below.

Madonna is hitting the road behind last year's "Confessions on a Dance Floor." The run kicks off on the West Coast in late May, and is so far scheduled to run until late July.

Following the tour's North American leg, Madonna heads across the pond for a European trek, details about which are posted at the tour's official website. Tickets for the Euro leg sold out in 10 minutes, according to information posted at Madonna's website.

As previously reported, some of the tickets for Madonna's upcoming shows are being auctioned off as part of a fundraising effort for Music Rising, an organization that replaces instruments and equipment that Gulf Coast musicians lost due to last year's hurricanes. More information is available at the auction website.

Before launching her tour, Madonna will warm up with an April 30 set at this year's Coachella Valley Music & Arts Festival.

Released last November, "Confessions on a Dance Floor" debuted at No. 1 on The Billboard 200 and has sold more than 1.3 million copies in the US to date, according to Warner Bros. Records. Helping to drive sales is the album's hit single "Sorry."