It was fascinating to see Patti LuPone that immense Broadway musical star interviewed with such palpable reverence by the ABC’s interrogator-in-chief Sarah Ferguson. Patti LuPone is  continuous with the glories of the Broadway musical. She first came to prominence in Evita on Broadway. She told Sarah Ferguson how closely she had worked with Stephen Sondheim and how demanding he had been on her musically that she hit the note in one go and not slide up to it.