Q: How do you tell when your showtune singer is at the door?
A: She can't find the key and doesn't know when to come in.
Q: How many showtune singers does it take to change a light bulb?
A: One. She holds the bulb while the world revolves around her.
Person 1: It must be terrible for an showtune singer to realize that she can never sing again.
Person 2: Yes, but it's much more terrible if she doesn't realize it.
Q: How many showtune singers does it take to change a light bulb?
A: None. Get the DJ to do it.