Chicago IX: Greatest Hits '69 - '74 was the band's first greatest hits collection. Originally released in November of 1975. Still to date, it is the biggest selling album of their career. Chicago IX features signature favourites the band still performs on tour today, such as "25 or 6 to 4", "Beginnings," "Saturday in the Park," "Does Anybody Really Know What Time It Is," and "Call On Me." It was the first Chicago album to feature pictures of the band on the cover, incorporated into their trademark logo.