How do you become a model for Hollister, A&E, or Abercrombie & Fitch?

I weigh about 120 pounds and 5'7. All my friends say I should go into modeling. I am really pretty and eat really healthy. I love beening in front of the camera. I just need to how to become a model. Leave something if you know and I am going to make a facebook now and put pictures of me, so you can see.