belle you got a flat belly i seen your tummy 
its all about what you eat when it comes to you tummy, even really skinny girls can hold fat round there stomach due to bad diet, excess sugar and salt coz bloating ect, your best bet is to make sure you have a healthy diet of fish,chicken,wholemeal pasta/bread, plenty of veg. when you able to plenty of ab excercises, the plank is awesome for abs, the fit ball is really good so have a go at sit ups on there, leg raises are also good for abs xx