Through my work I've had the fortune (and misfortune) of being around a lot of famous enertainers.
When people ask about that, only one memory sticks out - it just dwarfs all other encounters I've had...
Paul McCartney, followed by a medieval court sized entourage, once walked down a hall to thank me, personally.
For the rest of my life, I will never encounter someone more famous who will be so gracious and go out of their way to speak something kind to someone so relatively insignificant.
Nothing will top that.