1. Dreamgirls, “It’s All Over”/“And I Am Telling You I’m Not Going” (1982)
No matter how many times you watch Jennifer Holliday’s massive performance of Dreamgirls’ rafter-ripping Act I finale, the only adequate response remains awe. After a bickering backstage setup, the sequence kicks into gear at the three-minute mark; playing a woman in a spiral of personal and professional rejection, Holliday grabs her aria by the throat and squeezes every breath of wailing pathos from it. (Astonishingly, she was just 21 years old at the time.) A master of dynamic stagecraft, director Michael Bennett opts for aching slowness here. Holliday's movement grounds her in implacable abjection, right up to the number's startling penultimate image: After a giant gasp, her face a Kabuki mask of pain, the singer moans out a final note and reaches a desperate arm out for rescue as she sinks behind the golden waves of a falling curtain. That’s not just showbiz: That’s greatness.