Originally released in January 1970 as Chicago (and later dubbed Chicago II ), the album was a major breakthrough for the band and features some of the group's biggest hits, including the Top 10 singles: "25 Or 6 To 4," "Make Me Smile" and "Colour My World."

Nominated for three Grammy awards and certified double-platinum, the album is also known for several extended song cycles: "Ballet For A Girl In Buchannon" by trombonist/composer James Pankow; "Memories Of Love" by guitarist Terry Kath and composer Peter Matz; and "It Better End Soon" by keyboardist/vocalist/composer Robert Lamm. Robert Lamm and James Pankow have also become the latest inductees of the Songwriters Hall of Fame in 2017.

CHICAGO II: COLLECTOR'S EDTION comes with the Soundstage performance on CD and DVD, as well as the original Chicago II album remixed by acclaimed producer Steven Wilson on both CD and double-LP.

Chicago is an American rock band formed in 1967 in Chicago, Illinois. The "rock and roll band with horns" began as a politically charged, sometimes experimental, rock band and later moved to a predominantly softer sound, generating several hit ballads. The group had a steady stream of hits throughout the 1970s and 1980s. Second only to The Beach Boys in Billboard singles and albums chart success among American bands, Chicago is one of the longest-running and most successful rock groups in history.

According to Billboard, Chicago was the leading US singles charting group during the 1970s. They have sold over 38 million units in the US, with 22 gold, 18 platinum, and 8 multi-platinum albums.Over the course of their career they have had five number-one albums and 21 top-ten singles.