New decade, old dress

I'm sure you're all aware that New Year's Eve is coming up and there is so much pressure! I don't know what to wear! I dug through my dresses and pulled out quite a few options... so HELP ME! What should I wear? I am going to a "Fancy Pants Cocktail Party" at my friends Matt and Jim's house... It's indoors so I'm not too worried about being warm...

Option #1

Dress - vintage (1950s) from Junk Bonanza

Option #2 (I had to show the back on this one!)

 Dress - thrifted vintage (1980s)

Options #3 and #4

 Good vs. evil

Options #5 and #6

Dress - Hayden Harnett                       Dress - vintage (1950s) from antique store

So these are kinda rough ideas, I'm not totally sure on the tights and jewelry and etc so feel free to throw your two cents in the comments on ideas or things to change!


EDIT: Thanks for voting! Dress #2 narrowly won (by only 6 votes) over dress #5!