It looks like Americans are just as anxious as the rest of the world to get their hands on U2 360 Tour concert tickets.

Tickets for the Irish mega-band’s North American kickoff concert on September 12 at Chicago’s Soldier Field sold out immediately when they went on sale today at 10 a.m.

Around 65,000 tickets were sold, making the concert the largest single-day attendance record in Chicago.

The tickets flew off the shelves so fast that a second Chicago show was added for September 13.

Tickets for the second show will go on sale at 10 a.m. next Monday, April 6, at, Ticketmaster and (800) 745-3000.

Ticket sales went just as fast for the September 20 concert in Boston and the September 24 show in New York, and it was announced today that second New York show on September 25 has been added.

U2 has added more North American dates to the tour: September 29 in Washington, D.C.; October 1 in Charlottesville, V.A.; October 6 in Atlanta; October 9 in Tampa, F.L.; October 25 in Los Angeles and October 28 in Vancouver.

U.S. tickets are selling for $252, $97, $57 and $32, plus service charges.

But so far U2’s home fans back in Ireland are still the greatest, with a whopping 164,000 tickets sold in less than two hours.

All tickets for the band’s two shows at Croke Park in Dublin, the fourth largest stadium in Europe, sold out in 90 minutes. The band quickly added a third show to their Dublin schedule.

We'll have to wait and see if U2's 360 Tour will top their last.

The Vertigo Tour was the top grossing concert tour in 2005, with $260 million in 110 sold-out concerts worldwide. In North America alone, the tour grossed $138.9 million with around 1.4 million tickets sold.

The U2 360 Tour will feature the band playing in the round (hence the “360” in the tour’s title), with wraparound screens so concert goers can have the ultimate view. U2 are taking this concept to the nth degree as they are only playing in stadium sized outdoor venues.

The 360 Tour follows up the release of U2’s 12th album, “No Line On The Horizon,” which debuted at #1 on the charts in 31 countries.

The band recently announced that they will donate an estimated €9m (about $12m) from tour profits to charity.