I asked not because of bra -- it seems like a dress you can go braless in -- but because I think I can see your bellybutton. You might try it on with high-waisted pantyhose (and no underpants) and see if there's a line at the top of the pantyhose. My experience is that most fitted dresses have a little bit of generosity at the top of the waist, so the line might not show; and having something taut over your bellybutton means the dip I'm seeing in the photo -- probably correlating to the aforementioned shimmer of the fabric -- will be less noticeable.

Now I promise to stop being your elderly Aunt Florence. Here, have a safety pin. You never know when you might need it!!