I am wearing a mermaid-style bridal gown. So, pretty much the entire dress is form fitting. I wanted to know what were the best undergarments for enhancing my size "A" cup and were also slimming, especially in the tummy area. What is the best thing to wear to flatten your tummy? I have seen spanx and there are so many different styles, that I am not sure which is the best for me. What are your suggestions?