This homemade Leeloo from the 5th Element Halloween costume cost me $30; the wig was the most expensive part ($25).
I then bought a roll of white duct tape and used a white bikini bottom I already had. I folded up paper underneath the duct tape in the slightly more “sensitive” areas, so that removal would be a little more gentle.
I had a lot of great compliments and people taking pictures left and right. It was such a fun costume to do, and it was so cheap and easy. My co-worker had to help me get the tape straight; props to him. I did this costume on Friday night and another (Mystique from X-men) on Saturday night for Halloween ’09.