The Best of Chicago: 40th Anniversary Edition

The Best of Chicago: 40th Anniversary is a double greatest hits album, and the thirty-first album overall, by American rock band Chicago, released by Rhino Records on October 2, 2007. It consists of two discs containing 30 of Chicago's top 40 singles. It is the fourth compilation of past hits released by their label since beginning of the decade. Most of the songs on this compilation are presented as their shorter length radio-single edits, as opposed to the album versions. It also features "Love Will Come Back" without Rascal Flatts' vocals.

The 39 tracks of The Very Best of Chicago: Only the Beginning holds all the tracks of 40th Anniversary except for the tracks 13-15 on disc 2.

Although no indication is given on the discs or the cover, the album could also be considered as Chicago XXXI (31) in their canon, as it is preceded by Chicago XXX (30) in 2006, and followed by Chicago XXXII: Stone of Sisyphus in 2008. This is further emphasized by the display of albums on the band's website.

Chicago

 * Dawayne Bailey – guitar, vocals
 * Peter Cetera – bass, vocals
 * Bill Champlin – guitar, keyboards, vocals, group member
 * Donnie Dacus – guitar, vocals
 * Laudir DeOliveira – percussion, congas, vocals
 * Bruce Gaitsch – guitar
 * Keith Howland – guitar, vocals, group member
 * Tris Imboden – drums, group member
 * Terry Kath – guitar, vocals
 * Robert Lamm – keyboards, vocals, lyrics, songwriting, group member
 * Lee Loughnane – trumpet, flugelhorn, vocals, lyrics, songwriting, group member
 * James Pankow – trombone, vocals, lyrics, songwriting, group member
 * Walter Parazaider – vocals, woodwinds, lyrics, songwriting, group member
 * Chris Pinnick – guitar
 * Jason Scheff – bass, vocals, group member
 * Daniel Seraphine – percussion, drums, vocals

Production

 * Producer – Jay DeMarcus, David Foster, James William Guercio, James Newton Howard, Ron Nevison, Phil Ramone, Chas Sandford, Mike Engstrom, Cheryl Pawelski
 * Album cover design – Mark Paul Rosenmeier
 * Design – Joshua Banker, Don Jr. Garlock, Vincent Gonzales, Jim Jamitis, Jean Krikorian, Arnaud Leger, Al Mainwaring, Craig Stevens, Ashley Underwood
 * Photography – Jimmy Katz
 * Remastering – David Donnelly
 * Liner notes – Bill DeYoung
 * Product Manager – Mike Engstrom
 * Project assistant – Scott Webber
 * Supervisor – Jeff Magid
 * Editorial Supervision – Vanessa Atkins, Sheryl Farber
 * Annotation – Steve Woolard