Superior Movement

US five-piece vocal soul/funk group from Chicago's west side.
They performed from the early 1970's to the present.
Former members are : Billy Avery, Calvin Ford, Tyrone Powell, Stanley Ratliff and David Williams.
Last member teamed up the group is Gregory Spears.
In 1988, they participated to the famous [l=Budweiser Showdown]'s National contest.