Katie Thomas, the owner of vintage lingerie boutique 'WhatKatiedid' in London, told "Nightline" that the corset business is booming. "Our sales of corsetry are definitely going up even though there is a recession and compared with the rest of our lingerie it's taking up a bigger area of our markets," she said. Celebrities have also jumped on the trend. Miley Cyrus tweeted this photo in June 2012. (Twitter/@MileyCyrus)