This message has been deleted.

How true. Damn shame
Nothing is as it seems, nothing is just one thing and nothing is ever just over there;

Yeah saw that how true and embarrasing for her. Christopher Reeve also
Nothing is as it seems, nothing is just one thing and nothing is ever just over there;

LOL at that clip. Poor Margot having to go on and attempt to sell what she knew was a botched film 'its a good movie..uh yeah'

She should have kept the black hair instead of the brown color.
She looked very hot on the 1987 Letterman show.

It's not her, though. She looks bad in Superman III, which was filmed four years before those scenes I just posted from Vanishing Act. It's the makeup/hair/wardrobe/lighting that they used in III, and to a lesser extent IV.
This is how Kidder looked during the promo for IV. Note that she looks much better than she did in the film here as well:
http://supermaniv.com/Superman_IV_Videos/Superman_IV_Letterman_Kidder.html

That's incredible. How did she let her looks slide so radically?

You're absolutely correct. I just made this point in another thread.
Take a look at how Kidder looks in a film called "Vanishing Acts", which she did just a year prior to Superman IV:
Jump to 18:30
http://www.youtube.com/watch?v=GgPq7G6JZYA
Jump to 12:00
http://www.youtube.com/watch?v=Ym4ZAhgpM5E
She looks almost exactly as lovely as she did in Superman I.

Her make-up, her fashion sense, her hair her sassyness was completely lost on this film, i'm no director or producer but when they put this POS together did they not see how they would be taming the once beautifully sexy Kidder in SI and SII??