Depends how tall you are. 14 is a growing hormonal age. There is no definite height for your age either. It's really a height VS weight thing. I'm not gonna tell you to not worry about your weight cuz the truth is that all of us have to. But if your really worried about it don't do any stupid diets. Just make sure your not eating too many sweets and your living close to the Food Guide. I know Canada has an official one. I have no idea about USA but I imagine you do. (if your even from USA.)
Depends on her height. And how her body is naturally.. Like if shes one of them people who have a fast or high metabolism she is gonna be super skinny and might weigh less than a girl whos body is regular or bigger. ask your doctor if your that concerned about your weight.