How long does it take a 11-year-old to lose weightin about a week?

well, i am 13 and i am the "fat girl" in my middle school. when really i am just 10 pounds under weight their are way bigger girls in my school! And let me tel;l you this you really souldn't be trying to lose weight a such young state of your life. Because from first hand exprince if you lose weight at such young state of life you could die or hospitalized. i know this because me and my friend were doing a diet and my friend stoped eating and was very close to die like if she had gone 2 more hours with out eating she would have died!!! So don't worry about your weghit unlese you like 35 pounds overs weight!!!