I'm not sure if backstage retouching is your thing, but there's some amusement to be had on Christophe Huet's site, despite some irritating flash features. Paris-based Huet has worked on some large campaigns, including this one for Nissan, as well as Motorola, Citroen, Playstation, Nike and Snickers. He also had a hand in the the French Aids Awareness ads which caused such a stir. Worth a look.
Another image Huet has worked on. What can I say, I'm a sucker for an Afghan Hound.
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I used to do a bit of retouching, decided I was bored of it. That last one, is disturbing...which I always like. Do enjoy the shock factor.