Elvis Presley was left baffled by his pal Sir Tom Jones' refusal to take drugs, because The King couldn't contemplate dealing with fame without narcotics.
The Welsh crooner became close to the late legend when they were thrilling crowds in Las Vegas in the 1960s and '70s.
And Jones reveals his superstar pal was stunned when he stuck to alcohol instead of indulging in drugs on the Sin City party scene.
He tells The Sun, "He would say, 'How do you deal with fame?' And I'd say, 'Well, I enjoy it'. Then he'd say, 'What drugs do you take to enjoy it?' And I'd say, 'I don't - and I think that's maybe helped me.'"