The perils of being oversized

I got a cheongsam top for the wedding on Sat. It's the only decent top which I can fit in and do the side zip by myself after taking a deep breath.

Now that I actually manage to find something to wear for the dinner, I wonder if I might be able to drop ten pounds in approx. 48 hours so that I can breathe without worrying about burst tops halfway through eating the peking duck.