I will flip that and ask: who are the male equivalents of Demi Lovato, Mariah Carey, Celine Dion, Tori Kelly, etc. in popular music? I'm hard pressed to think of male singers with vocal power, range, fluidity, general skill, etc. who aren't in niche genres or deceased. Stevie Wonder? Bruno Mars? It's certainly not Ed Sheeran, Justin Bieber, or Adam Levine.