Diva Mariah Carey is the queen of subtle shade.

Demi Lovato previously hit out at the Hero star after Mariah claimed she didn’t know who Jennifer Lopez was and had never met her.

In June, Demi took to Twitter for the way Mariah “constantly disses” people, and now the superstar has got her own back by claiming she has no idea who the Confident singer is.

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Demi commented on a meme which paralleled Mariah, 46, to Ariana Grande, 23, with the caption: “When you order it online vs when it arrives.”

She wrote underneath the post: “You got it the wrong way around honey (sic).”