Chicago is a rock band that was formed in 1967 in Chicago, Illinois. In the bands debut, they began as a politically charged, sometimes experimental rock band headed by the three-headed monster of singer/guitarist Terry Kath, singer/bassist Peter Cetera and singer/keyboardist Robert Lamm. The band featured an unusual and unusually versatile line-up of instrumentalists, including saxophonist Walter Parazaider, trombonist James Pankow, and trumpet player Lee Loughnane, along with more traditional rock instruments — guitarist Terry Kath, keyboardist Robert Lamm, drummer Danny Seraphine, and bassist Peter Cetera (who was the last to join the original group). The bands original name was 'The Big Thing', which changed to 'Chicago Transit Authority' when their first album "The Chicago Transit Authority" was released. Soon after the album's release, the band's name was shortened to simply 'Chicago', when the actual Chicago Transit Authority threatened legal action.
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