Jessica Biel, Beyonce Top Risky Web Celebs

If you're looking for a Jessica Biel screen saver or a Beyonce ringtone, you'd better practice safe searching.

The actress and singer take the top spots McAfee's third-annual "Most Dangerous Celebrities in Cyberspace" list.

According to the Internet security company, if you search the Web for Biel-related downloads, you have a one in five chance of infecting your computer with spyware, viruses, spam and other malware.

Searches for Web sites related to Beyonce, who has come in second place for two years in a row, will bring up a site linking to dangerous malware and spyware.

Rounding out the top five are Jennifer Aniston, Tom Brady and Jessica Simpson. Brad Pitt, last year's riskiest star to search for, dropped down to 10th place on this year's list.

Young Hollywood made up much of the list. "Twilight" stars Robert Pattinson and Kristen Stewart came in 30th and 20th place on the list, respectively, while Taylor Swift, Miley Cyrus, Ashley Tisdale and Zac Efron also made appearances.

One notable name that is safer to search for is Obama. The president and first lady ranked in the bottom-third of the results, in the 34th and 39th spots.

Click here to see pictures of the Top 15 and the dangers you may encounter when searching for them.