I'm getting married in a few weeks and I am wearing a very simple sheath? dress that is extremely delicate silk (but not charmeuse) and clingy. I am very thin and petite but anyone wearing a dress like this needs a little help from shapewear to hold all of our stuff together - not really wanting to jiggle my stuff as I walk around. Can you recommend any specific brands or stores to go to for this stuff (as I have never needed to buy any)? I have seen a lot of brands around but want a specific recommendation. They all look the same but I know they don't all perform the same. I particularly need something to create a smooth silhouette in the butt/thigh region and hold it all together tight! However, since the fabric is so light I don't want lines showing that I'm wearing it underneath. Please tell me all your tips!