Jerry Springer is another one. He does look slightly old obviously, but still acts like he's much younger.
Not that he's a celebrity, but I work with a dude who's retiring next month. I asked him how old he is because I didn't think he was anywhere near old enough to retire, and the fucker is 64! I know that's not ancient, but I honestly thought he was 48-50 at the most. I asked him what he did to maintain his youth and he told me he has never smoked anything in his life or had a single drink since he was in his teens.
If that's what it takes, looks like I'm fucked lol