The trick, and I say this as someone who's gotten to meet a fair number of musicians, including some semi-famous ones, is that they're people. Plus they're also huge music nerds. Just mention Cheap Trick and you're in... (Although at the same time, do know how to read the room - it's not that hard to tell when someone just wants to be left alone.
Those genuine interactions are better than any autograph or selfie.
Sort of related: I was friends with a world-famous surgeon at UCLA, chairman of the urology department (he married an ex-girlfriend whom I stayed on good terms with).
His patient roster was a who's who of Hollywood: Groucho Marx, Katherine Hepburn, Cary Grant, etc. He told me the secret of getting these famous people to follow his orders: he always included something in his post-op instructions that would force them to do something they'd much rather not do.
Making them compliant created a kind of master-servant relationship with the surgeon as master; these megastars were so unused to following orders that the harsher the Rx, the more they regarded the doctor as a demi-god.
Those genuine interactions are better than any autograph or selfie.