I'm working out to reach my weight loss goal of 5lbs which will bring me to 120 lbs from 125 lbs which I'm now at. (14 yrs. 5ƍ") I understand that I can't spot reduce certain areas, but the weight that I'm trying to lose is located on my lower body. I'm already small chested (An A cup) and it seems that as I lose weight its shrinking my chest even more. Any ideas as to why that is and what I can do to lose weight more efficiently? Or am I bound to lose weight in my chest first?

your boobs are made up of fat. for most people when they start losing weight they lose some in their chest area. Unfortunately your body has a cruel way of losing weight sometimes where you may not need it.

The boobs are the first thing to go and the last thing to grow. Not much you can do about it!