 Here's what McWhorter had to say about hearing Lawrence Tibbitt sing, Oh Bess, Oh Where's My Bess, and five other numbers from Porky and Bess. I think that some of what's going on with some of those Tibbitt tracks is the issue of whether white people should be allowed to sing like black people and to what extent white people should be allowed to pick up a self-consciously black idiom.