You know how some people have a go-to little black dress, which they can wear to anything? I feel like I need a go-to costume, for the same purpose.
It's too late for this year, but I feel like this dress, made in silver lamé knit, would be THAT DRESS. Obviously, it could be any kind of Space Empress, but also you could turn it into a robot, or add some kind of tabard and be a playing card, or a knight, or any number of things. And if you did it right you would never be cold on Halloween, and you wouldn't have to worry about showing too much skin, or uncomfortable shoes, any of the other dumb things that come with costume-wearing. Silver hooded dress: the savior of Halloween. (It's almost as good as a gorilla suit!)
The jumpsuit … could also be a costume. A very, very scary costume.
This dress is even ON SALE: Jen of is having a Halloween Weekend sale of 20% off until The Witching Hour of Midnight (ET) on October 31, 2010. Coupon code is 'sewscary'. [Geddit?]