Tabloid Queen. Throw on a short trench coat, big sunglasses (think Mary Kate Olsen), gather one or two tabloid newspapers, and pretend “like your trying hide, while secretly wanting to be noticed.”  You can turn this into a couple costume by having your partner act as a member of the paparazzi or your publicist.
Total cost: $0.00-$10.00, depending on the size of your headline.