I found this really funny audition once called, like, "Confessions of an Ugly Stepsister"--I think. I just looked for it online, but I haven't found it yet--I'll keep looking though.
It's really funny, and not dirty or anything, so it's good for a children's show. I've used it before. If I can find my copy of it I'll just type it up--good luck!
"No thoughts within her head, but thoughts of joy.....no dreams within her heart but dreams of love."