She may be known for her playful giggles and killer looks, but now movie star Cameron Diaz has become the most dangerous celebrity on the Internet.

Diaz, 37, is top of the list of the most dangerous celebrities to search for online, above second-placed Julia Roberts, according to computer security company McAfee, Inc. Last year’s most dangerous Web celebrity, Jessica Biel, fell to third.

One in ten websites featuring the “Knight and Day” star contain malicious software intended to infect computers and steal data from users, according to research released on Thursday by McAfee. More>>