There are tons of excellent exercises you can YouTube, and follow along. Even then you should not worry about having a bigger belly. Who is to say only "skinny" people can wear certain clothing? Everyone is beautiful in their own way always remember that! :)
Well there is a party that is coming up in December and I'm not really fat its just my stomach its kinda too big. I really want to wear a half shirt what do I do?
The best thing you could do is open YouTube and search for belly fat exercises... No need for diets and such stuff. But you have to do it daily at least for 10 days!!!