For the fourth year, McAfee has compiled its "most dangerous celebrities" study, a list of commonly searched athletes, actors, musicians, or politicians that scammers are using to lure you to their sites. The three celebrities to top this year's list are Cameron Diaz, Julia Roberts, and Jessica Biel, McAfee said.

Searching for Diaz online gives you a one in 10 chance of landing on a risky site. If someone searched for "Cameron Diaz screensavers," about 19 percent of the sites that popped up contained malicious downloads, McAfee found.

When it comes to Roberts, meanwhile, the overall chance of stumbling upon something malicious when searching for her on the Web is 9 percent, but if you search for "Julia Roberts and downloads," your chance of hitting something risky jumps to 20 percent.

Biel, who was number one last year, also has an overall search risk of 9 percent, searching for her name and screensavers give you a 17 percent chance of landing on a malicious site.

Full story: PC Magazine