Maroon 5 will be joined by Sara Bareilles this Thursday at Union Station in downtown Chicago at part of a collaboration between The Jimmy Kimmel Show and Plot Your Escape. The event is part of a nationwide simultaneous concert event with New York, Los Angeles, and New Orleans. Maroon 5 and Sara Bareilles will take the stage in Chicago at the same time that Mary J. Blige and Gavin DeGraw take the stage in New Orleans, Mariah Carey and Diddy in New York, and Nicki Minaj and Cee Lo in Los Angeles. Chicago arguably took the winning combination on this one! Tickets are free, but getting your hands on a pair will prove to be very difficult. Ticketmaster has reportedly run out of tickets already, but hinted at additional tickets being released closer to the concert date.