Barney Martin as Amos Hart on Broadway. Photo by Martha Swope, 1975. Did you know, “Mr. Cellophane” in Bob Fosse’s Chicago  was based performances by Bert Williams?  Williams was the first modern Black entertainment star: the first Black recording artist, one of the earliest Black leading men on film, and the first Black performer to star in a major Broadway production (Ziegfeld Follies) with white actors. His signature song, “Nobody,”  a hauntingly comic lament about being u