Is it possible to loose 15-20 lbs by new years and if not how much by new yrs? how long will it take 2 loos it?

.....and if not possible please tell me how much weight is possible to loose my new years....im 16 yrs old....5'3' am 126-130 lbs and want to be 110-114 lbs, plz help! or plz tell me help me with ways not to eat junkfood