Here is this great "before and after" exposé Jezebel.com did in their Photoshop of Horrors series (take note of how FRIGHTENINGLY thin they made her arm! Oh no, let's not let readers think celebrities have bones or muscle!):
[See the article for words on this animation of the before and after pictures, links to Redbook's opinion on the piece, and an annotated version of the work that was probably done on her photo.]
There is also this picture of Sam Mendes and Kate Winslet Annie Leibovitz did for Vanity Fair recently:
Now, don't get me wrong, from far away this look like a beautiful photo (granted, I do think Annie Leibovitz' reservoir of creative ideas has been drying up a bit and that she relies too heavily on her famous subjects as interesting photography, but that's another story), not to mention that I love this pair - in addition to Revolutionary Road (you should see it if you haven't, absolutely shafted at the Academy Awards, but - again - another story).
But, WHY IS HIS LEFT ARM WEARING A COAT WHEN THE REST OF HIS BODY ISN'T??
You'd think Vanity freaking Fair would be a little bit more careful when they composite photos like this. Close, but no cigar.
Also, I am addicted to these Photoshopping videos on YouTube. It's a little bit creepy and really makes you look twice when you're reading a magazine.
There are literally hundreds of videos like this out there... So bizarrely intriguing.
All that said, though, I'm not great at Photoshop, but I'd like to learn a bit better. I did make this one picture of M.I.A. into a cartoon, which I need to touch up a little bit (the ink weight on her leg should be a bit more tapered, especially, plus I don't like the little speech bubble and want to change the dialogue). I did it using a tutorial I came across online (I don't remember the link, though...)