Okay I have a really strange question. Does the petticoat go under or over the long bra? I'm wearing a ball gown and between the bra, petticoat, and dress, I'm finding it uncomfortable in the rib cage. I dont think I can get away without a bra much less a regular strapless. I'm thinking if the petticoat was under the bra it might allow more breathing room. Any thoughts??