Chicago 17 is the fourteenth studio album by American band Chicago, released on May 14, 1984. It was the group's second release for Full Moon/Warner Bros. Records and their last with founding bassist/vocalist Peter Cetera.A total of four singles were released from the album, all of which placed in the top 20 on the Billboard Hot 100 chart. The success of the singles propelled Chicago 17 to achieve an RIAA certification of six times platinum.