Christmas Party Dress Decisions

My friends and I are going to be cute this season and have a swanky Christmas party, complete with papercraft ornaments, Secret Santa, mocktails, carols, mistletoe, cakepops, and formalwear. The last part is where I'm slightly nervous. We want to have a party before everyone goes their separate ways for winter break, so this means that I have to get a dress in less than two weeks. After a whole night of searching online and eyeing up dresses, I've found a few options that cost less than $40 (It's really difficult for me to shell out more than that on one article of clothing) and I need your help!

Option 1:

This Asos dress is so pretty! It's still available in my size, and it's made for petite women, so there's a strong possibility that it'll actually fit. The front looks plain but I think that the back makes enough of a statement that it works. It's classy without trying too hard. Price: $26.96 for the black one, $44.93 for the red.

Option 2:

This dress from GoJane.com is so flattering for pencil shapes (like myself). The curvy lines and colorblocking add a nice touch, and the black and white scheme is perfect for wearing to a get-together. I also think that the sweetheart bust is cute because it reminds me of 1920s cigarette girls. It's always nice to have a hint of vintage in your wardrobe, no matter what! Price: $29.40 for plum/black or white/grey.

Option 3:

The final option is also from GoJane, because I love that site. I've been looking for a dress like this for ages-- One that has the flared sleeves and mini as a nod to the '60s and '70s. I found this dress on the site as well, and it's very similar to the dress posted above, except the bottom is loose and free-falling. I'm still on the hunt for a dress like these two, but with an empire waist baby-doll look to the bottom instead. In the meantime, I'm considering this one, because I'm thinking it's going to be a while till I find that dream dress. (Oh, and clearly I will be wearing something to cover the top on the inside! Haha.) Price: $31.70 for Plum, Navy, or Black.

It's quite difficult to choose one! I thought I might as well open it up to the general public, since so many of you have the same taste as I do. What's your favorite?
<3 Linda