answer:You are still growing, a LOT, at this time so you should NOT put yourself on an extremely hardcore diet. I would suggest just eating healthy, getting plenty of protein in your diet and dancing! Simple little tweaks in your diet, cutting out too much junk food, sugars, sodas, etc. and moving more will get you into better condition quickly. Walk, dance, swim, ride your bike, walk your dog, go hiking, mix up your exercise routine. You could be on the cusp of a growth curve and this extra 8 lbs. you are concerned about most likely will take care of itself if you shoot up another inch or two in height. You need lots of calcium too for your growing bones. I would talk with your doctor for a better idea of whether you even need to worry about reducing. I think just paying attention to your diet and ramping up your exercise is all you really need to do