Yes, your body will fill out as you grow older.But at 16, don't obsess over your body.Girl to woman is a wonderful journey, if you know how to enjoy it.Understand that your body shape will keep changing as you grow older, get married, have kids, go through mid-life and grow old.Concentrate on staying happy, healthy and fit.Your mental state of mind WILL reflect on your face and health, so you may have a super bod, but what's the point if you've lost your contentment and look completely stressed out!This is the age all girls become aware of their look, and get so obsessed with trying to change it. What they need to be aware of is their lifestyle. Set a routine which can be carried on for life: healthy eating, exercising, and most important, accepting and being comfortable with who you are.Appreciate yourself, and let others around you appreciate the real you, instead of just your look.All the best! Have fun and enjoy your journey!