I am not usually a fan of 'sexy' versions of fem/girly versions which are overtly sexual but this costume was made for a nightclub so I think it's ok.
So I made a dress and stay up stockings out of wetlook two way stretch lycra cut out a plastic mask and chucked on a wig I had around the house.
The club I wore this to is Neko Nation which is a cute nerd/japan type themed club. If one is on in your city, go to it. You will have fun I promise.