In no order:
1.) The auction into the overture (chandelier rising) in PHANTOM
2.) Bernadette Peters' ROSE'S TURN
3.) Mary Stuart Masterson's brilliant performance in NINE
4.) The end of RENT when Mark's video is playing on the wall, then at the very end Angel runs out and joins them all.
5.) When Hedwig gives with wig to Yitzhak and she takes over.
There's aren't my top 5 EVER, just what came to my mind first.
And can I just say that the fact that someone's best moment in their entire life was at Idina Menzel's final performance is infcredibly scary? Honey, ask your parents for a life and some therapy.
"If you are going to do something, do it well. And leave something witchy."
-Charlie Manson