Elphaba & OTA
Elphaba signed up for a slot to sing at the last minute. She wasn't even sure she would go through with it until she was on the stage. She sang Defying Gravity, a song she felt defined her feelings as well as any words ever could.
She very nearly seized up twice during the number, when she looked out and realised people were watching her, but she powered through it. And when the song was gone, she ran off the stage, entirely embarrassed that she had done that, and feeling exhilarated at the same time.