That seems to be the norm among performers. Without the makeup (which men wear, as well), lighting and whatnot, they are quite ordinary and even plain individuals. Nicole Kidman, for example, is actually strange-looking. Check out www.deansplanet.com, the section called "Celebrities Without Makeup."
I, LITERALLY, ran into her in a bank 10 or so years ago and she has that farm girl glow. She is very pretty without makeup and was just plain beautiful with it.