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Most people realized that models in magazines are heavily Photoshopped.  And there are a bunch of videos online where Photoshop experts show just HOW MUCH editing goes on.

http://youtu.be/Hnvoz91k8hc

 

But check out the newest one from CollegeHumor.com.  They do it in reverse, so it starts out with a flawless looking model in a bikini.  But by the end of the video, it's not what you're expecting.  (She turns into a piece of pepperoni PIZZA.)