YouTube Rewind: What Was Hot in 2013?

Tribute to this year's incredible hit viral videos.
3:00 | 12/12/13

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Transcript for YouTube Rewind: What Was Hot in 2013?
We start with an incredible tribute this morning. Youtube gathered some of the people and animals that have made 2013 such an amazing year. It's a viral video titled "what does 2013 say." A nod to "what does the fox say?" Some of the many dance videos. Robin thick. Two dozen goats. So, what happens when you roll all of those into one video? It goes viral, of course. This youtube rewind has been viewed over 12 million times since yesterday. It is the most popular video on the site right now. Since we talk about youtube a lot and what's happening in the world of social media, what do you think was the most downloaded video of the year was. Any guesses? It's not the fox -- maybe it's the harlem shake. Fox is the most-viewed video. The music video was "gangnam style." And miley cyrus, number two and three. Two and three? Wow. No. Just early last year. You love it so. You know, cats are a big hit on youtube. And for the second year, they'll get their own film festival. Gilles marini will host the cat festival in park city. It features the best original scripted cat-inspired shorts. And america gets a chance to vote for their favorite feline film. The winner gets $50,000. That is good. The golden litter scoop. The event is hosted by fresh step. Makes sense. Thank you. And finally, it is time for cookie balls. Play the song for me. Oreo has released a new video of their holiday treat. Don't look at me like that, josh. Put a little carrot on it. Give it some flippers. You made a penguin. It's gone viral with lines like, we're getting presents to each other. I'm making something I'll be giving you all. Robin, you -- you cannot buy these. You have to make them. Enjoy. They give you the recipe. You need cream cheese. You need oreos. You mash them up and cover them in chocolate. Enjoying them? Good. Who doesn't love cookie balls? I know. I'm not a -- don't judge my cookie balls. You had to do it. I want to say thank you to the chef. They are delicious. You can get the recipe online. Oh, great. And the song, I'm telling you, it's a winner. Mark my words. Cookie balls. Go to the next story. Might want to take the camera off of josh right now.

This transcript has been automatically generated and may not be 100% accurate.

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