Some examples of image manipulation to add to a previous post.
This is from the material promoting Katie Couric’s now ended news anchor job:
And here’s one that shows how they differently change men’s bodies (head shrunk, biceps enlarged):
This is what Roddick’s arms really look like (but you can google image him and find many many images in which he looks more like this than he does on the Men’s Health cover):
Also see this interactive website here.
NEW: Samantha J. sent in a link to Picture-Perfect, a gallery of images comparing real photos of celebrities such as Jennifer Hudson and Liv Tyler to Photoshopped images of them on magazine covers. Thanks, Samantha!