Prom Probs!!

So I get to go to Prom this year and I'm super super excited!! I got my dress and I'm totally ready! I just have one small problem...I have no clue where to put my pump at :/ I thought about getting some really wide elastic and sewing it so it will fit either around my waist or my thigh. That's my best idea so far.... Anyone have a better one? Let me know! Thanks :)