How can I lose 10 (or a few more) pounds in 5 or less weeks when I'm 13 and a girl?

I'm pretty happy with me weight, I'm 5'4" and 125 lbs. I'm mostly muscle in my legs and arms, but I am (and always have been) self conscious about my lower stomach area because it is mostly fat. I have recently grown a muffin top and it shows really badly when I wear a tank top, low rise, normal, or high rise shorts/pants. This has made me feel really bad about myself considering I used to be overweight. Please, just help me figure out how I can lose this weigh! Thank you!

(P. s. I'm almost positive that I'm done growing and have had my period, if that makes a difference.)
How can I lose 10 (or a few more) pounds in 5 or less weeks when I'm 13 and a girl?
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