Happy Wednesday Hollywire readers!

For this week's Go Viral videos we have Charlize Theron's leaked sex tape -- let me tell ya, that girl is into some kinky stuff -- 25 years of Lindsay Lohan in 60 seconds, Christina Applegate duetting with Stevie Nicks, Justin Bieber getting slimed and more!

Charlize Theron Kinky Sex Tape

Celebrity sex tapes are usually no laughing matter, but actress Charlize Theron is changing that. The 36-year-old actress was the star of a Funny or Die April Fool's Day joke, in which she starred in a leaked sex tape. The premise for the vid was that Theron misplaced her cell phone in the Funny or Die offices and the staff members couldn't help themselves and hacked into the device, revealing a kinky sex tape. You hear Theron quip, "Move over Paris and Kim, because I'm into some really kinky sh-t," in the vid. The video was one of many videos from Theron's phone being hacked by Funny or Die.

Lindsay Lohan Changing Faces

This next vid really isn't a laughing matter at all. Drugs are a big issue in Hollywood and have destroyed many lives and careers. One of the most notorious drug users in Hollywood is actress Lindsay Lohan. In the video above you see a photo morph of the young star, showing how the effects of drugs and alcohol have changed her face over the years. The changes are both sad and shocking to say the least.

Christina Applegate & Stevie Nicks Duet

Lightening things up a bit, we bring you Christina Applegate taking the stage not as an actress, but as a singer. Christina and musical legend Stevie Nicks sang a duet on Up All Night. It was Nicks herself that decided to make a guest appearance on the show after Ava said she was going to try and get Nicks on the show back in the pilot. The clip features Ava (played by Applegate) doing a fantasy duet with Nicks.

Hall and Oates Cover

Another top viral vid of the week is Hall and Oates -- I can't Go For That - Cover by Nicki Bluhm and The Gamblers. This group has the blogosphere all a buzz with their amazing YouTube vid. In the vid the band is driving in a van performing one of the best Hall and Oates covers EVER!! They have a travel guitar, acoustic guitar, xylophone and even a kazoo. The cover is truly amazing!

Justin Beiber Slimed at KCA's

Everybody loves a good sliming and in case you may have missed last Saturday's Kids' Choice Awards, our fav singing sensation Justin Bieber got the sliming of a lifetime. After accepting his award for Favorite Male Singer, Bieber was ambussed by gallons of green gooey slime. Definitely the highlight of the KCA's, slime came at the superstar from every direction. He was completely drenched.

Well, that's it for this week's top viral vids!! Hope you enjoyed!

What was your fav video?