Q: How many sopranos does it take to screw in a light bulb?

A: One. She holds the bulb and the world revolves around her.


Q: How altos does it take to screw in a light bulb?

A: They can't reach.


Q: How many tenors does it take to screw in a light bulb?

A: They can't, because "It's too high!"


Anyone know if there's a bass/light bulb joke?