In Step up 4: Miami Heat, the mob creates a dance that goes viral. Celebrities are tweeting about it and news reporters are going crazy for it. The video quickly reaches millions of views and keeps rising.
We've already had a look at some of the best viral videos and here's some more for you to have a look at...
The T-Mobile ad team very smartly planned for this ad to go viral and it worked because it was undeniably entertaining and just plain fun. Great moves, fantastic crowd reactions and a real feel good factor.
Sophia Grace and Rosie
While this is slightly more of a performance rather than a dance, you can't help but smile when watching this video. Sophia Grace and her slightly less imposing side kick, Rosie, meet their hero Nicki Minaj on the Ellen show. Sophia's rendition of Super Bass, accompanied with dance moves, is pretty impressive.
Who can honestly say they didn't attempt this one on the dance floor? Jumping in the wrong direction or missing out one of the steps. Most of us failed miserably but it was still great fun all the same.
Fred the Raver
At around 50 seconds the song drops and Fred pulls out his best screw face. There's something about children dancing or singing that seems to encapsulate us.
Gangnam Style really caught wind and just didn't stop. It's likely to be a one hit wonder, like Soulja Boy, but who cares.
The dance is great fun and a countless number of celebs have been willing to prance around on their pretend horse.
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