This site has some really amazing photoshop examples. First up is a typical magazine-style pic of a beautiful girl. Roll your mouse over and see what she really looks like. (I wish I could just pull the pics for you, but I'm not that talented.)
I think it's important in this day and age to recognize what is a healthy, practical, attainable body image. We should try to eat well and stay active, but still recognize that it is unlikely we will acheive that airbrushed physique.