Eventually it became The Chicago Transit Authority with the addition of members James Pankow on trombone, Robert Lamm on vocals and keyboards, and Peter Cetera on vocals and bass.
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He has also provided background vocals on several Chicago songs, and the occasional lead vocal such as on "Let it Snow! Let It Snow! Let It Snow!" from Chicago XXV: The Christmas Album.
Robert E. Lee | Spike Lee | Jerry Lee Lewis | Bruce Lee | Peggy Lee | Lee Konitz | John Lee Hooker | Christopher Lee | Lee | Stan Lee | Lee Kuan Yew | Jamie Lee Curtis | Ang Lee | Washington and Lee University | Tim Berners-Lee | Lee Hsien Loong | Lee Strasberg | Stewart Lee | Rickie Lee Jones | Lee Marvin | Lee Greenwood | Gypsy Rose Lee | Fort Lee, New Jersey | Brenda Lee | Lee Harvey Oswald | Tommy Lee | Tommy Lee Jones | Lee Ranaldo | Dolores Lee | Lee H. Hamilton |