Looking for the most bountiful month for Chicago concerts, it's got to be October. After the summer festival season has closed down for good, the city's concert venues reap the rewards, booking acts that skipped outdoor show in favor of indoor autumn gigs. You'll find Elton John, Justin Timberlake, Fleetwood Mac and Gorillaz taking over the United Center, Ed Sherran headlining an evening in Soldier Field and Phish playing three nights at Allstate Arena. Plus, Nine Inch Nails will spend three evenings at the Aragon and Ween will headline a special Halloween concert. Find even more amazing shows with our guide to concerts in Chicago in October.