Why do people assume they're fat because they don't look like they're ill-like the stars you see in Glossy magazines?
I bet most you girlies are gorgeous the way you are! You just need to realise it, and see the potential you have!!
Sure, there is no harm in losing a bit of weight to gain some self esteem, but don't over do it! I think girls look better with a bit of fat anyway, after all, do you wanna look like a real person or not? :)