Freddie Mercury - he had a vocal range twice as wide as the average untrained person. And he never had any vocal training. By the way - the correct answer to "The Beatles or The Stones?" is "QUEEN!!!!!"
R.I.P. Clarence Burke, Jr. (May 24, 1951 - May 25, 2013) lead singer of The Five Stairsteps. After the group broke up, he formed The Invisible Man's Band and had a big hit with 1980's dance classic "All Night Thing". Here he is (he's wearing the hat) with his three younger brothers & sister performing their soul anthem on Soul Train.