I have opted for a sweetheart neckline (nothing too dramatic, though - it doesnt go down really far, but its just enough so that it doesnt qualify as a soft sweetheart, either). I have zero boobs. We added some cups to the dress, so it looks like I have a little more - but they say that sweetheart necklines are really for bigger breasted girls. I'm nervous now and think maybe I should just do a regular strapless?