The whisper register of Mariah's voice is inimitable, and she's really leaned into it more as her voice matured. But it started in the '90s — and in my opinion, it always sounds best in performances of "I'll Be There." When she sings, "You and I must make a pact," I still get goosebumps. She turns the Jackson 5 hit into an even bigger hit. Yes, the MTV Unplugged version is iconic and went to No. 1 on the charts, but this performance at MSG, to me, is even better. She sings to the sold-out arena and uses her whispering vocals, crisp high belts, and genius musicality to deliver a duet that no one is topping any time soon — or ever, really.