First of all, don't say that you're stupid. That is annoying and not a proper way to ask for advice. Don't do it again, I'm serious.

Second, there is no such thing as "spot training" so you can't just lose your belly. Genetics determine where your body holds stores the most fat, and where you lose that fat from first. Some women lose in the hips and thighs first, for some maybe their stomach, others the arms, etc. For me I lose in my arms and boobs first, then my hips and thighs and stomach last. To get the results you're looking for you need to reduce your overall body fat and increase the muscle underneath. Now how to do that...

Your diet is going to have to change. Stop eating fast food- NOW. You will NEVER, EVER get a flat stomach eating all of those carbs and sodium. The extra sodium in processed foods makes you retain water, which makes you look bloated. I'm not sure what you mean by "not restricting yourself" but that's kind of the whole point of calorie counting. To lose weight you have to burn more calories than you consume. It sounds like you don't really need to lose weight though, I think what you're really interested in is body recomposition. You said that you haven't been putting on weight with what you're eating right now, so you're already eating at maintenance. Maintenance is the amount of calories you can eat everyday without gaining weight. Add up what you typically eat and that should be the amount of calories. From there, I would limit your carbs to less than 30% of your total calories consumed for the day. The kind of carbs you eat is also very important. Celery is carbs, but that won't hurt you. Bread and pasta on the other hand will hurt you, especially breads made with white flour. Start reading ingredients and quit eating anything that has "enriched white flour." You should also quit eating anything that is "no fat" "reduced fat" or "low fat" because that usually means it is just full of artificial sugars or sweeteners, which keep your belly looking belly-like.

Another myth, it doesn't really matter how much you eat at what time of the day, just do what works for you to stay in your goals. I prefer a big dinner so I skip breakfast, but if it helps you avoid mindless snacking, then you should eat breakfast. Don't worry about not eating after 6 pm. You need to think about calories in/calories out on a 24-hour cycle. Late night eating doesn't make you fat. Overeating makes you fat. Most of the time people who eat at night overeat - it's correlation, not causation.

For exercise, roller skating is great and burns a ton of calories. Doing the push-up program is a nice addition, but you really need to build strength. The best way to build strength is by lifting weights, there are other ways, but nothing will work as fast and as well as gold ol' fashioned pumping iron.

And since you are already so small, I'm going to say no, it's probably not possible to do it in a month. The leaner you are the harder it is to lose weight. You are young though so with a lot of hard work and some diet adjustments you can get pretty close.

By the way I'm not trying to be mean, I just don't like hearing people say they are stupid. Hold yourself in high esteem and others will too!

I read the original post and I was going to respond.... then I read your reply and realized there was no point in me responding. Yet I'm still responding, but I don't think it's helping. ... what I mean to say is, HEAR HEAR.

Edit: or is it HERE HERE? I never know...

I agree with all the above, I am just going to add: Planks and Pilates! Like every day! Try and build up to being stronger and stronger. You are a good weight, I think it is just a muscle/fat ratio thing.

Come back and let us know!