From the 314hits website:
It's going down tommorrow Saturday August 22nd the Soooo! St. Louis Summer Fest invades downtown STL. It's St. Louis's biggest free concert of the summer. We have several artist, comedians and poets performing. Plus this event is entirely free. The Soooo! St. Louis Summer Fest starts at noon and ends at five pm and is located at the Old Post Office Plaza on 9th and Locust. Hope to see you there!