David Clayton-Thomas (born David Henry Thomsett; 13 September 1941) is a Grammy Award-winning Canadian musician, singer and songwriter, best known as the lead vocalist of the American band Blood, Sweat & Tears. Clayton-Thomas has been inducted into the Canadian Music Hall of Fame and in 2007 his jazz/rock composition "Spinning Wheel" was enshrined in the Canadian Songwriter's Hall of Fame. In 2010 Clayton-Thomas received his star on Canada's Walk of Fame.
Clayton-Thomas began his music career in the early '60s, working the clubs on Toronto's Yonge Street, where he discovered his love of singing and playing the blues. Before moving to New York City in 1967, Clayton-Thomas fronted a couple of local bands, first The Shays and then The Bossmen, one of the earliest rock bands with significant jazz influences. But the real success came only a few difficult years later when he joined Blood, Sweat & Tears.
Clayton-Thomas's first album with the band, Blood, Sweat & Tears (which was released in December 1968) – despite the self-titled name, actually the band's second album – sold ten million copies worldwide. The record topped the Billboard album chart for seven weeks, and charted for 109 weeks. It won five Grammy Awards, including Album of the Year and Best Performance by a Male Vocalist. It featured three hit singles, "You Made Me So Very Happy", "Spinning Wheel", "And When I Die" (on the Hot 100, each peaked at No. 2 and lasted 13 weeks) as well as a rendition of Billie Holiday's "God Bless The Child".
With Clayton-Thomas fronting the band, BS&T continued with a string of hit albums, including Blood, Sweat & Tears 3 which featured Carole King's "Hi-De-Ho" and Clayton-Thomas's "Lucretia MacEvil", and Blood, Sweat & Tears 4, which yielded another Clayton-Thomas penned hit single, "Go Down Gamblin'" and "Lisa Listen to Me".
In 1972 Thomas released his first Columbia solo album after BS&T, simply titled "David Clayton Thomas". In 1973 the second solo album Tequila Sunrise was issued by Columbia. In 1974 he issued the Harmony Junction album on RCA. In 1975 Thomas returned to front Blood Sweat & Tears again on the Columbia albums New City and in 1976 More Than Ever. In 1977 they released Brand New Day on the ABC label. In 1978 Thomas issued another solo album on ABC titled simply Clayton. In 1980 BS&T issued the MCA album Nuclear Blues which also included Thomas. Later in the decade Columbia issued the double live BS&T album Live And Improvised again with Thomas. In 2004, Clayton-Thomas left New York for Toronto and launched an All-Star 10-piece band. Since then, he has toured and recorded almost a dozen albums under his own name.