Knowing that your finger prints don't look like anyone else's on the planet , how then can you expect your body to look like the celebrities that you admire. It simply isn't going to happen. You can't force your body to be something other than what it was created to be. We are unique , and wondrously made.
Let it go , and you become the person that God created you to be from your beginning. Accept, and appreciate yourself , and appreciate the differences in others. Your body is as valuable to God as any of those girls who are in those magazines - only the magazine people don't understand that.