My school's having a semi-formal on friday

[CMMTeddy]

Dances aren't exactly my thing, but I've been needing to get out for a while now. Thing is, I'm not 100% sure what to wear. I've gone through my closet and narrowed it down to three different dresses but not sure which one to pick, so help me decided, please.

I was planning on taking pics of me in the dresses themselves, but my camera decided to kill itself today, so yeah. I just found some pics online that look pretty close to the dresses I'm deciding between, it'll have to do.

So, dress #1:
http://www.milanoo.com/upen/v/201005...ss-28163-1.jpg
I got the pic from the same place I bought the dress so this is exactly how it looks.

Dress #2:
http://www.milanoo.com/upen/v/200902...ess-5249-1.jpg
Although mine cuts off just above the knee.

And dress #3:
http://www.milanoo.com/upen/v/201006...ss-28634-1.jpg
This is pretty much an exact replica of mine.

What do you think?