Carl XVI Gustaf
King of Sweden, 1973-Present
Carl is such a stern-looking royal figure, the Internet's made a sport of Photoshopping him with silly hats. So you can imagine Sweden's surprise when Carl XVI Gustaf: The Reluctant Monarch hit shelves in 2010. The book claimed Carl used to frequent strip and sex clubs in his younger days, conduct naked Jacuzzi parties with models, and host the errant orgy or two. (At least one prominent mistress, pop singer Camilla Henemark, was also mentioned.)
Now of course, Carl could've written this off as tabloid fodder the second it hit -- most of the sources were anonymous -- but he made matters exponentially worse by holding a press conference in which he denied absolutely nothing. In fact, it kinda seemed like he was admitting to everything. Several months later, he backpedaled and said it was all lies, but by that point, pictures had already surfaced of him in one of the strip clubs. And his buddy Anders Lettström confessed to contacting a supposed mob boss about covering up the photos. Maybe just sit this next one out, Carl.