Lady Sings the Blues takes the life story of Billie Holiday, arguably the best of all jazz singers, and made it into a 2 and a half hour vehicle for Diana Ross. And why not? Ross is terrific in the role, as she goes from young girl working as a scrubber and/ or being raped by drunks to becoming a nightclub singer in New York City for tips, and then little by little her talent sees her off to singing across the country, and singing then at bigger venues. Oh, and the drugs, too. All the actors actually are believable, from Williams to the “Piano Man” Richard Pryor to the guys who make up Holiday’s band on the road.