Freddie Mercury had a vocal range twice as wide as the average untrained person. He never had any vocal training!
His range was 4 octaves, which is pretty impressive for any singer. However, what's more impressive about Freddie's range is that he never had any formal vocal training before becoming as famous as he did. He was the frontman for the British band "Queen," which launched his career to the proverbial stratosphere. He later had a successful career as a solo artist.
His talents were many; Mercury played piano, sang, and wrote songs. His legacy is pretty big. Mercury was mentioned in Kurt Cobain’s suicide note, and “Queen” is still popular to this day, having some songs considered among the best rock songs in history.