What is the best way to lose the fat on my stomach?

I have had a bit of a gut stomach since I was 9 years old… i am 25 right now and pretty much everywhere on my body i am basically pretty skinny. It looks pretty ridiculous on me but i cant seem to get rid of my gut. I hear doing crunches/sit ups will do nothing for me if i have fat covering my stomach muscles. So what are some easy ways i can do to get rid of this annoying stomach fat?