I have had several of these dreams. The first one was last year in November. I was sitting in the audience of Wicked and JLT was unable to perform and the understudy and stand-by were sick too. They needed someone to perform and so they asked for an audience member who could sing the part and I raised my hand. They brought me backstage and put me into costume. I went out and performed and got a ton of applause at the end.
The other one I had was on December 29th, the night I saw Wicked. I wound up playing Elphaba because of something, I don't remember how. I was a little shaky on the high belting parts but I ended up playing the part for a year.
I also had one where the fired Emmy Rossum and used me for Christine in the movie of POTO. Let's just say that I am very wierd.
"He who falls in love with himself will have no rivals"
-Benjamin Franklin