Austin Powers & Fembot
Fembot: Head to any trashy lingerie store and pick up the pinkest, poofiest negligee you can find (or grab one out of your closet - judge free zone).
Austin: Pick up a pair of glasses from the drugstore, a puffy white shirt, and a blue blazer. As long as you use the words shag and groovy often enough you'll be good.
[Photo via @jenny__beans]