I don't recall talking to someone who didn't know who Mariah Carey was. Maybe they knew about her but just couldn't tell what songs she sang but
never did someone not hear about her at all.
I'm happy Mariah is not recognized with a certain song a la Celine's "My Heart Will Go On". There were times when I had to remind people
(elderly lol) who she was and when I would say "the one who sang the Titanic song..." they would instantly say "Oh, OK, I remember that
song".