Play Audio Clip Listen to audio clip.

Play Audio Clip Listen to audio clip.

Here's what's going viral now on Facebook.

"Britney Spears - Till The World Ends"

It's the music video for the pop star's latest single.  Set against a gritty, post-apocalyptic world... it shows Britney dancing like there's no tomorrow.

Then, there's this:

"Einstein vs Stephen Hawking - Epic Rap Battles of History."

The outrageous spoof shows Albert Einstein trading lyrical spars with a very eloquent Stephen Hawking.

And, Facebook users are shaking their rump to: "Booty Pop Song."

The romantic ballad about butts is actually a parody of the Black Eyed Peas songs, "Boom Boom Pow" and "Just Can't Get Enough."

To check out these videos and more, go to FOX News Radio dot com.

I'm Lauren Faulkner and those are your Facebook Status Updates on FOX News Radio.