"The Cult of Leia's Metal Bikini"

http://www.wired.com/news/culture/0,71267-0.html?tw=wn_technology_1

Princess Leia's slave-girl costume occupies a unique position in pop culture and shows no signs of slipping.
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The costume department made a mold of Fisher's torso for a custom fit, and Rodgers says there were multiple versions of the outfit to accommodate different scenes. "One was a hard metal piece that (Fisher) wore when she was not doing any stunts, and one was a rubber piece that we formed so that she would be comfortable when doing stunts," she says. "It was lined with leather so it wouldn't chafe her body."
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"Most of the crew are men, and they really enjoyed being on the set," Rodgers adds.
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Her advice for fans who want to make their own? "There's a lot of stretchy fabric out there. I would use rubberized material from anywhere. And hand stitch it so there are no big explosions when you're walking about."

 

And if you're not careful, wearing one will drive you into rehab.