The drugs is what got his voice, he had surgery to remove growths on his vocal chords in the late 80s. Im not saying that his voice would still be the same. But he still sounds great.
Seriously? Firstly, he looks fucking gorgeous in this video. And secondly, are you really asking why a 65 year old man cannot reach the same high notes as he did when he was 27?
Umm, he's over sixty five. If you're a singer and you get older, your vocal cords just can't replicate what you did as a younger man. Paul McCartney has said the same thing. Its honestly only cigarettes that really kill your voice.