The Slave Leia costume is one of the most iconic Star Wars costumes simply because it's the sexiest. There aren't a ton of sexy Star Wars costumes, so you better bet that the nerds are going to focus on the one bikini in the whole series. Nerds can picture themselves as Jabba the Hutt, chaining a girl up because it's the only way they could get a date. It's ultimate wish fulfillment.
What's better than one slave Leia? Two slave Leias. This must be her and her stunt double doing some sunbathing on the Tatooine desert. They needed a stunt double in case the Jabba the Hutt puppet went crazy and ended up going on a killing spree. You can never be too careful with those puppets, especially if they are the size of a Uhaul truck.