Mariah Carey is known to be a diva, a shady one at that. She completely transformed the meaning of the phrase: “I don’t know her.” After using it in reference to Jennifer Lopez years ago, it became MiMi’s calling card. So when Andy Cohen invited Mariah to "Watch What Happens Live," they played a game of “Do You Know Her?” and there were some causalities. She still doesn’t know J. Lo, and doesn’t know Ariana Grande either.
Cohen also asked Mariah about Demi Lovato’s tweet over the summer where she accused Mariah of being “nasty” to J. Lo. She replied, “I don’t know her either. So I wouldn’t say anything to her. She should come up, introduce herself to me say ‘Here’s my opinion. What do you think about it?’ That’s how you handle s—t.”
And just like that, Demi joined the rest of them in the land of the unknown.