What shall I wear at tomorrow's christmas party?

Well, I have two choices, first, I'll wear a skirt and it's either a skull fitted-blouse top or a great shirt I bought from "Art Work" The second one is a fitted gold jeans I got from ies with the same top in my first choice... Well, my problem is that.. is it going to be a skirt or jeans???? I'm gonna wear a fab.gold sneakers but it looks sucks with the SKIRT.... HELP!