Unfortunately, I really don't think that you should rely on that dress showing up in time for your function, and even if it does happen to get there in the nick of time, what happens if you are completely unsatisfied with it, and you don't have time to go and look for and purchase another dress? Us women all know how time it takes to find just the right dress that is the right cut, color, doesn't show too much skin, or too little. It has to be just right. It's a science picking out the perfect dress for our bodies. I would suggest that just in case, you go shopping, find another dress, purchase it, and then if the other dress does arrive in time and you love it, and everything else is perfect with the dress, and you are able to wear it to your function, wonderful! No harm done! You just go return the other dress right after your function, or, if it was affordable, you may want to keep it as a back up for future events like I do. Never hurts to have a spare dress on hand just in case of an emergency ;) ;) Actually, I will often go to stores and look at the cocktail dresses, and when the store puts them on clearance, that's when I buy them. Not because I need one because I'm going somewhere right then, but like I said, it's always good to have spares on hand for when you do need one, and if you can get them on clearance, all the better!