Watch out: Brad Pitt and Beyonce are the world’s most dangerous celebrities when it comes to the Internet. A new McAfee security study found the duo top the list of stars used to trick people into installing infectious software on their computers. (Guess you don’t have to be a presidential candidate to attract that kind of honor.)

Trying to track down photos or even info about Pitt puts you at an 18 percent chance of snagging a virus instead, McAfee says. The reason? More than half the results for search terms such as “Brad Pitt screensavers” are actually malware in disguise. When it comes to Beyonce, the worst threat comes from fake ringtone services that are really just out to steal your personal information.

Other high-ranking celebs apt to infect your system with a virus include Heidi Montag, Lindsay Lohan, and Fergie. (We suspect that’s not the first time that sentence has been used.)

But enough of our mildly entertaining observations; serious issues await. Read the following list of McAfee’s most dangerous Internet celebrity searches. Memorize it. Protect yourself. Also protect yourself if you happen to encounter any intimate physical contact with numbers 4, 7, or 12. Just sayin’.

1. Brad Pitt
2. Beyonce Knowles
3. Justin Timberlake
4. Heidi Montag
5. Mariah Carey
6. Jessica Alba
7. Lindsay Lohan
8. Cameron Diaz
9. George Clooney, Rihanna
11. Angelina Jolie
12. Fergie
13. David Beckham, Katie Holmes
15. Katherine Heigl

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