Human cupcake Ariana Grande has demons, a predilection for serial killing, the power of Kabbalah on her side, a Moon Man trophy after last night’s VMAs, no time for Katy Perry, and the showily soulful voice of someone playing Mariah Carey in a Broadway musical biopic. What she does not have, though, is the general ability to articulate her words when she sings. Someone I was talking to at a party this weekend described her as having permanent peanut butter mouth. That person is correct.