Best example is probably the "Tonight" reprise, particularly when all five parts come together at the end. On paper, it's incredibly chaotic. In practise (as this troper can attest, having been in it last year), it's positively GLORIOUS.
In that same scene when she screams at Shrank not to touch Tony. And for once, the bigoted jerk keeps his mouth shut and steps back. The grudging shred of respect he has for her in that moment is evident.