It's not really like you have a thing like a supermodel anymore. It's more of a word than a real existence. I think, also, looking at it from a designer's point of view, at one point maybe they felt the stars took too much attention away from the clothes.
“The loss of liberty which must attend being a wife was of all things the most horrible to my imagination.”
“Women's Lib? Oh, I'm afraid it doesn't interest me one bit. I've been so liberated it hurts.”