<P> The original version of "Do It Again" is in the key of G minor, with Fagen on lead vocals . The song uses a large amount of syncopation in the vocal melody . </P> <P> The tune features an electric sitar solo by Denny Dias . The "plastic organ" solo by Donald Fagen was performed on a Yamaha YC - 30 with a sliding pitch - bending control . </P> <Ul> <Li> Donald Fagen--Wurlitzer electric piano, Yamaha YC - 30 organ and vocals </Li> <Li> Denny Dias--electric sitar </Li> <Li> Jeff Baxter--guitar </Li> <Li> Walter Becker--bass guitar </Li> <Li> Jim Hodder--drums </Li> <Li> Victor Feldman--percussion </Li> </Ul> <Li> Donald Fagen--Wurlitzer electric piano, Yamaha YC - 30 organ and vocals </Li>

Who sang lead vocals on do it again by steely dan