Need to get some Pentatonix tickets for the concert at Illinois State Fairgrounds - Grandstand? TonsOfTickets is a trusted source of all Pentatonix Illinois State Fairgrounds - Grandstand tickets that are available today. All you need is to find the tickets you need for the upcoming show at Illinois State Fairgrounds - Grandstand in Springfield. When choosing your seats, use the interactive venue map which will allow you to know your exact location in the venue.