The final rendition of Come What May, particularly the moment when Christian, after a long pause, sings back - confirmation that he's regained his belief in his and Satine's love. The crescendo of "Come what may"s that follows only drives it home.
For this troper it was when Satine breaks out of song to simply say: 'I love you. Till the end...of...time' to Christian. The fact that neither of them even care about the showing and are just loving one another, not acting, right there on stage is also pretty cool.
"Elephant Love Medley," from beginning to end.
Christian: Love lifts up where we belong... where eagles fly, on a mountain high! Satine:Love makes us act like we are fools; throw our lives away, for one happy day! Christian: We can be heroes! Just for one day...