These are the top 15 most dangerous celebrities to search for on the web, according to internet security experts McAfee. Cybercriminals use the popularity of these celebrities to attack your PC with spyware, spam, phishing, adware, viruses and other malware.

1 Brad Pitt
When "Brad Pitt screensavers" was searched, more than half of the resulting Web sites were identified as containing malicious downloads with spyware, adware and potential viruses.

2 Beyoncé
Inputting "Beyoncé ringtones" into a search engine yields risky Web sites that promote misleading offers to gather consumers' personal information.

3 Justin Timberlake
Interest in his high-profile relationships makes him an easy target for spammers and hackers. When searching for "Justin Timberlake downloads" one Web site advertised free music downloads that were flagged as directly leading to spam, spyware and adware.

4 Heidi Montag
The Hills star is a popular search term when it comes to searching for wallpaper. A host of wallpaper Web sites contained hundreds of malware-laden downloads.

5 Mariah Carey
Spammers and hackers are using Mariah Carey screen saver Web sites to link to other sites proven to contain spyware, adware and other threatening downloads.

6 Jessica Alba
Red-ranked risky sites were identified when searching for "Jessica Alba" and "Jessica Alba downloads". The sites contained hundreds of malicious downloads, links to other bad sites, misleading offers to gather information, and a high number of spam emails when an email address was provided.

7 Lindsay Lohan
This young Hollywood starlet is as dangerous to search online as she is famous. Searching for "Lindsay Lohan downloads" resulted in several dangerous Web sites laden with hidden adware.

8 Cameron Diaz
Cybercriminals use download Web sites related to Cameron Diaz's image to link to other harmful sites containing spyware.

Joint 9 George Clooney, Rihanna
The technology found one website embedded with hundreds of dangerous wallpaper and photo downloads after inputting "George Clooney downloads". "Rihanna pictures" was also a risky search term, as McAfee identified a site that spammed its test email address.

11 Angelina Jolie
When "Angelina Jolie downloads" was searched, the software highlighted a risky site with 978 hidden malware-infected wallpaper and photo downloads, as well as links to other potentially dangerous URLs.

12 Fergie
A Fergie screen saver site was flagged as offering 111 risky downloads that could seriously compromise a PC's privacy with unwanted spyware and adware.

Joint 13 David Beckham, Katie Holmes The "David Beckham" search term generated a great deal of wallpaper and screen saver downloads veiled with malware. Consumers should also exercise caution when searching for "Katie Holmes" online - one download site advertised free screen savers that, if downloaded, would infect your computer with malicious programs like spyware.

15 Katherine Heigl
Hollywood's big headliner in recent years is now susceptible to Internet lurkers too. "Katherine Heigl" was searched and a site was identified containing hundreds of malware-infected pictures.

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