Demi Lovato Shades Mariah Carey After Ariana Grande Comparison

Yikes! Demi Lovato, 23, started up some official beef with Mariah Carey, 46, on June 16, when a fan posted a mean meme comparing Mimi and Demi’s friend Ariana Grande, 22. Though Mariah never said anything directly, Demi called her “nasty.”