Thank God, we are all different, and we all have something to share in our own way. In folk music, there is no "right" way. No one can sing "Old Man River" like Paul Robeson did, why would anyone even try? What ever made Sinatra think he could do it justice? Answer, he did it his way, and I'll bet there are plenty of people who think he did it well.(especially those who have never heard Paul Robeson sing it! It's all a matter of opinion.