Chicago – Chicago IX Chicago’s Greatest Hits

A Collection of CHICAGO'S Greatest Hits

Chicago IX: Chicago's Greatest Hits is the first greatest hits album, and ninth album overall, by the American band Chicago and was released in 1975.

Including all of Chicago's biggest hits to date, this set stretches from their 1969 debut, Chicago Transit Authority, to 1974's Chicago VII. Chicago VIII and its hits, having only come out just months earlier, were considered too recent to anthologize, while Chicago III's material was overlooked for inclusion due to its lack of top-selling singles