What to wear: New Years Eve

Now that Christmas is over (sort of...), it's time to start thinking about New Years Eve (too early?). 

With a party to ring-in the new year, naturally I am asking myself "what the heck do I wear?"

As I see it, I've got two options: 

A Dress?

(1) // (2) // (3)

Pros: 

- I don't often wear dresses.

- Being fancy is easy.

- I don't get many opportunities to wear a fancy dress (pro 1 + pro 2..does it count?).

Cons: 

- Unlikely to wear again - I don't often wear dresses. 

- Could be cold. I am always really cold.

Top & shiny pants?

Tunic, Leggings, // Pants, Peplum top

Pros:

- More likely to wear again - can be remixed a little easier.

- I really want an excuse to get coated jeans or leggings...

Cons: 

- Maybe not as fancy as a dress.

- Again, don't get many opportunities to wear fancy dresses. I might feel like I'm wasting one!

Gosh, I have no idea what I'm going to wear. Against some peoples' recommendations, I'm heading into town for some boxing day shopping..Some of these sales are 1-day only and you know me and sales... :\
We shall see what I end up with!