Chicago is an American rock band formed in 1967 in Chicago, Illinois. The self-described "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. They 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.

Chicago 13 is the eleventh album by the American band Chicago, released in 1979. The follow-up to Hot Streets, Chicago 13 is often considered an unpopular release among Chicago's catalog, both critically and with fans. This would be the band's final release that features Terry Kath's replacement Donnie Dacus.

Well aware that musical trends were evolving, with disco at its peak in 1979, Chicago and co-producer Phil Ramone went for a slick sound, placing the band into a late 1970s clubbing context. While at the time they felt they were moving on and exploring new areas, Chicago's move into that territory, especially "Street Player", was reviled by critics and bewildered the group's rapidly dwindling fanbase. While all band members would contribute to the songwriting (one of only two albums where this was the case, the other being Chicago VII), Robert Lamm and James Pankow's once-prolific songwriting had dwindled, while Peter Cetera was still gaining in momentum, singing most of the lead vocals.

After recording sessions in Montreal and Hollywood, Chicago 13 - which saw the band return to numbering their albums with their trademark name logo - was released that August and was preceded by Donnie Dacus' "Must Have Been Crazy" as lead single - a track that couldn't have been further removed from Chicago's well-known sound. As a consequence, Chicago 13 was the first Chicago album to bear no significant hit singles, hurting their reputation greatly, especially since they had just re-signed with Columbia Records for millions. With dismal reviews, Chicago 13 only reached #21 - good enough to go gold, but well under expectations. Not long after its release, realizing that the union was perhaps not as well-fitting as originally thought, Terry Kath's replacement, Donnie Dacus, was let go. Now at the end of the 1970s and facing an uncertain future, Chicago pondered what their next move would be.

In 2003, Chicago 13 was remastered and reissued by Rhino Records with a B-Side, Dacus' "Closer To You" (an outtake from the Hot Streets sessions), and the 12-inch single mix of "Street Player" as bonus tracks. (Trivia: The songs "Street Player" and "Closer To You" had previously been released by other artists -- "Street Player" by Rufus, who originally recorded it before Chicago; and "Closer" by Stephen Stills, though with a Donnie Dacus lead vocal.

Track listing

 1.   "Street Player" (Danny Seraphine/David Wolinski) 9:11
 2.   "Mama Take" (Peter Cetera) 4:14
 3.   "Must Have Been Crazy" (Donnie Dacus) 3:26
 4.   "Window Dreamin'" (Walter Parazaider/Lee Loughnane) 4:11
 5.   "Paradise Alley" (Robert Lamm) 3:39
 6.   "Aloha Mama" (Danny Seraphine/David Wolinski) 4:11
 7.   "Reruns" (Robert Lamm) 4:29
 8.   "Loser With A Broken Heart" (Peter Cetera) 4:43
 9.   "Life Is What It Is" (Laudir de Oliveira/Marcos Valle) 4:37
10.   "Run Away" (James Pankow) 4:18

Bonus Tracks on Rhino Re-issue:

11.   "Closer To You" (Donnie Dacus/Stephen Stills/Warner Schwebke) 4:54
12.   "Street Player" (Dance Mix) (Danny Seraphine/David Wolinski) 8:44