My mom is 60 and has only heard one Mariah Carey song in full - the duet with Whitney Houston. She "knows" who Mariah is but isn't familiar with her music at all, and doesn't like the few songs she has previewed on youtube. I thought it was weird given how much she likes female pop and r&b. Maybe Carey is too "new" for her, but that's like what....early 90s? She likes 90s and beyond Whitney Houston.
But her fave is Tina Turner.
My mom's fave is also Tina.
And she doesn't know Mariah either. But Mariah was mostly local to the USA even during her prime. She's a non-factor here.
Sorry Touchdown