In 1971, Chicago was the first rock act to sell out Carnegie Hall for a week. Chicago is one of the longest-running and most successful rock groups, and one of the world's best-selling groups of all time, having sold more than 100 million records. Billboard also ranked Chicago ninth on the list of the 100 greatest artists of all time in terms of Billboard 200 album chart success in October 2015. In September 2008, Billboard ranked Chicago at number thirteen in a list of the top 100 artists of all time for Hot 100 singles chart success, and ranked them at number fifteen on the same list produced in October 2015. Parazaider retired from touring in 2017 but remains part of the band as a founding member. Although the band's lineup has been more fluid since 2009, Lamm, Loughnane, and Pankow have remained constant members. Seraphine left in 1990, and was replaced by Tris Imboden. Cetera left the band in 1985 and was replaced by Jason Scheff. Bill Champlin joined in 1981, providing vocals, keyboards, and rhythm guitar. Kath died in 1978, and was replaced by several guitarists in succession. Laudir de Oliveira joined the band as a percussionist and second drummer in 1974.
Cetera, Kath, and Lamm shared lead vocal duties.
Lee Loughnane on trumpet, James Pankow on trombone, Walter Parazaider on woodwinds, and Danny Seraphine on drums. Growing out of several bands from the Chicago area in the late 1960s, the line-up consisted of Peter Cetera on bass, Terry Kath on guitar, Robert Lamm on keyboards, Self-described as a " rock and roll band with horns", Chicago's songs often combine elements of classical music, jazz, R&B, and pop music.
The group began calling themselves the Chicago Transit Authority in 1968, then shortened the name in 1969. Chicago is an American rock band formed in Chicago, Illinois, in 1967.