I need something to slim by tummy under my prom dress , the only problem is?

Hmm thats tough...the only thing would be one of those body form things like they sell at khols. You slip it on and it slims you down. I guess you would have to get a skin colored one because there wouldn't be anything you can get that would just suck your tummy in. It would need to go all the way around to pull everything in tight! :/