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Mariah Carey has sing-off with Ariana Grande, Jennifer Hudson in special
Mariah Carey — in the Diana Ross role, naturally — joins vocal forces with Ariana Grande and Jennifer Hudson to sing “Oh Santa!” It’s more like, “Oh snap!”This holy diva trinity goes down as the must-see moment in “Mariah Carey’s Magical Christmas Special,” which started streaming on Apple TV+ on Friday.Over the happy, hand-clapping jam, the three songbirds do more cooing than real belting. You can just feel J-Hud holding back — perhaps as not to upstage the star of the show — although she can’t help but bust out a few bigger notes.Then they all let loose a bit at the end with a brief battle of runs and riffs, as elves hoof around them in the toy factory.