Dr. Brooke Magnanti

Celebrity sex blogger Belle de Jour has revealed her real identity: She's has a PhD in informatics, epidemiology and forensic science and is now working -- only as a scientist, not a call girl! -- in Bristol.

After six years, a book and a television show (Secret Diary of a Call Girl, starring Billy Piper), she's publicly owning her identity. She ran out of money while studying for her degree in London and turned to an escort service to help pay for the rest of her education.