Robert William Lamm (born October 13, 1944) is an American musician and a founding member of the rock band Chicago. He is best known for his songwriting, vocals, and keyboard melodies, most significantly on the band's debut studio album, Chicago Transit Authority (1969). Lamm wrote many of the band's biggest hits, including "Questions 67 & 68", "Does Anybody Really Know What Time It Is?", "Beginnings", "25 or 6 to 4", "Saturday in the Park", "Dialogue (Part I & II)" and "Harry Truman".
