I'm 5 foot 2, weigh 8 stone 6 with a body mass of just under 22. I eat well infact I love food. 
My question is this, I'm on day 8 of beach body hip hop abs and already starting to see results, my abs are solid under the layer of belly fat.
However, if I continue I'm worried that I will lose to much weight and then be under weight for my height. I'm tiny everywhere but my stomach. Exercise doesn't seem to increase my appetite so how do I keep to my ideal weight and continue with my plan to remove the belly fat.