Emma Watson, best known for her portrayal of Hermione Granger in the Harry Potter movies, has been named most dangerous celebrity to search for on the Web in McAfee's annual report

"Searches for the latest Emma Watson pictures and free downloads have more than a 12% chance to land on a malicious site that has tested positive for spyware, adware, spam, phishing, viruses or other malicious stuff," according to McAfee, whose study is based on the company's site ratings technology. Such searches appear to be even more dangerous when Watson's name is linked with terms such as "nude pictures" and "fakes," as cybercrooks bait bad websites to nab unsuspecting Web surfers, often offering them free downloads.

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This marks the first year that the Top 10 list has included all women. Comedian/talk show host Jimmy Kimmel is the only male even cracking the Top 20.

No. 2 on the list is actress Jessica Biel, who was No. 1 in 2009. Others on the Top 10 list include: Eva Mendes, Selena Gomez, Halle Berry, Megan Fox, Shakira, Cameron Diaz (2010 champ!), Salma Hayek and Sofia Vergara. Heidi Klum was last year's most dangerous celeb to search for.

McAfee milks its dangerous celebrity study by carving up different lists for different markets, including most dangerous British athletes to search for in cyberspace (tennis player Andy Murray). 

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