There’s a little box called a Vocoder, which changes a singer’s pitch to perfect pitch. That title is used by a lot of pop stars to multiply their voices, without them having to sing multiple times, for their studio recordings. Some people call that cheating. There’s all sorts of superior technology available to make average singers sound great, if a studio wants to do that. They hire producers, and engineers, who can craft a giant pile of commercialized goop, that their market researchers, doing focus groups with human dummies, have determined is what you, or a large demographic group, like teenage women, or boys, or urban teens, or 20 year olds with cash, to spend on music, anybody they think has a lot of money to spend on recordings or concert tours, wants to hear. Then they craft songs they think those groups will fall in love with. It works for them, they are selling Ariana, and Nicki, and whoever else, pretty well! They do it with the incredibly talentless rappers too.