The actress and heiress won over two other Americans, Angelina Jolie and Britney Spears, in the survey which was published on Thursday. Spears, who is expecting her first child, dropped from the number one spot last year.
Actress Ingrid Chauvin is the first French celebrity on the annual list.
Votes were tallied electronically on the FHM internet site from January 25 through March 28. According to the magazine, more than 210,000 people took part in the survey.