I dunno why people say Ariana sounds like Mariah.
She is literally a Katharine McPhee carbon copy.
I think the only reason compare her with Mariah is because of the dolphin squeals.
Tonally and vocally, the girl is just Katharine McPhee singing Mariah's climaxes.
Especially singing I Have Nothing.
Taylor will be looking to knock out her competition so I wouldn't be surprised if she tries to make Lorde work with Dr Fluke, Max Martin and Bonnie McKii.