Well, if you accentuate your butt, then a lot of attention will be taken away from your belly. So that's a good idea in itself. Skirts and high waisted jeans can be your best bet in this situation. A good pair of yoga pants leggings can also do the trick on top of a loose blouse. A little word of advice posture also matters in this case. If you want a great Instagram photo, stand up in a position where you are a little bit arched.