ID=3500687As tickets went on sale Friday morning at 10 a.m. CT, Garth Brooks was set to kick off his comeback tour with a single concert at Chicago's Allstate Arena. Less than three hours later, one show had turned into 10.

The country superstar now has 10 concerts booked at the arena from September 4-14.

That includes three double-headers on September 6, 12 and 13, when he'll give two performances at 6 p.m. and 10:30 p.m.

Tickets are only available online at or by calling 1-800-745-3000. The Allstate Arena has an approximate capacity of 18,500 for concerts.