How do i loose my stomach fat?

K so im 13 years old and weigh 112! I am skinny (arms and legs) but i have alott of fat in my stomach! How do i loose it safely! Tell me some foods i can eat that are healthy and what kinda excersizes should i do?I want to loose it by formal (3 monthes away)
Thanks
Dont say something stupid like LIPO please!