<Li> Lead vocals by David Clayton - Thomas </Li> <Li> Background vocals by Bobby Colomby, Dick Halligan, Steve Katz, and other assorted vocalists </Li> <Li> Instrumentation by Blood, Sweat & Tears (including) <Ul> <Li> Fred Lipsius--alto saxophone, piano </Li> <Li> Lew Soloff--trumpet, flugelhorn </Li> <Li> Chuck Winfield--trumpet, flugelhorn </Li> <Li> Jerry Hyman--trombone, recorder </Li> <Li> Dick Halligan--organ, piano, flute, trombone </Li> <Li> Steve Katz--guitar, harmonica </Li> <Li> Jim Fielder--bass </Li> <Li> Bobby Colomby--drums, percussion </Li> </Ul> </Li> <Ul> <Li> Fred Lipsius--alto saxophone, piano </Li> <Li> Lew Soloff--trumpet, flugelhorn </Li> <Li> Chuck Winfield--trumpet, flugelhorn </Li> <Li> Jerry Hyman--trombone, recorder </Li> <Li> Dick Halligan--organ, piano, flute, trombone </Li> <Li> Steve Katz--guitar, harmonica </Li> <Li> Jim Fielder--bass </Li> <Li> Bobby Colomby--drums, percussion </Li> </Ul>

Who sang you make me feel so very happy