Princess,
I wish I had good news to report, but it generally doesn't get better with age. The comments made can be brutal and the pressure to be "perfect" and "thin" only more intense, especially during the middle school years. Peers yield a mighty sword in this area.
Someone made a comment that those celebrities and models are "really" thin because the camera adds 10 pounds. That may have been true at one time, but not anymore. With the advent of computers, photos are easily brush and models "thinned". I saw an interview with a model that revealed that her photos were altered regularly, with the area of her waist being a place that was easily made smaller with computer software. Apparently, our daughters are trying to live up to something that even the models, themselves, cannot live up to.
Even the cameras on television fool the eye. Did you ever notice that celebrities rarely have any lines on their faces. Diane Sawyer, who is nearly 60, doesn't have a line on her face thanks to the camera lenses used. They even have TV camera lenses that "elongate" them so that they will appear thinner and taller.