I am a 12 year old girl 5'1 and weigh 150 how do i lose weight?

well that depends. some of us like me are bigger boned. i am 12 5'4 and 154 pounds. it just depends on your height. you can calculate your body mass index or bmi. which will tell you if you are overweight or healthy. just involve yourself in plenty physical activity and you will be fine. hope this helped.