i do, i didn't for a really long time but i get it
its not about the celebrity per se, its really about their art and what it means to you personally. some people just connect with it at deeper levels. Bowie's death was something i actually mourned. like not just "awww, thats sad, RIP." i legit mourned his death. i was and still am a pretty awkward person but as my mother is a fan, i grew up listening to his music until i was his fan in my own right. as a young preteen and teenager especially, it was something that i could identify with at certain levels that i simply could not with most other things in my life. Bowie taught me it was okay to be weird, his music kept me company whenever my life was rough, and he taught me tolerance of people in general.
i still get teary eyed whenever i listen to that last album Blackstar. i don't know that i ever won't.