Because Cully's comment below prompted it, an Instant Message Excerpt:
"So Boy is on the phone with our friend A, who unbeknownst to me has been working on 9 to 5. Today was the first run through, and dolly has been there for the past few days helping. So they start the show, with the iconic piano bit and the stage manager yells, "HOLD! WE GOTTA HOLD!" So they hold for a bit with the piano still playing, and dolly yells, "NO!!" and runs on stage, and tells the orchestra to "hit it." She belts out all of "9 to 5" to an almost empty theatre and the whole cast comes out to watch. She finishes, and then they ask her to sing something else, and she says "No, this isn't my time to be on stage," and the orchestra just starts playing an impromptu version of "I Will Always Love You" and she sings that, too. And everyone cries. The end."