How to lose 5 pounds in 10 days?

I need hep. I need to lose 5 pounds in 10 days. I have this gorgeous dress but it doesn't fit me the way I want it to. I figured 5 pounds would make it fit me much better. I have an award event for academics in 10 days so I need to look nice. I can't change much of my diet but I am open to new/fun exercises. Please, please, please help me.