What exercises do I need to do to lose my belly fat?

What exercises do I need to do to lose my belly fat?
Ok I am a very fit person 5’8 and weight 138lbs. My stomach is completely flat but still I can’t see the six pack. Its covered by a little layer of fat that I need to lose. I do tons of abs exercises, but I still can’t see the six pack, I need to lose that little fat that is covering it. So what are good exercises for this?