It's hard to believe but 2013 is nearly in the record books. To celebrate the occasion, YouTube recently invited some of this year's most popular video acts to come together and create a special mashup video - a year in review of sorts.

If you've kept up with viral videos this year, you'll likely see many familiar faces. In fact, there are more than 50 cameos in this year's Rewind. Given the fact that 80 percent of all YouTube views come from outside of the US, it comes as little surprise that global phenomenons like Psy and Ylvis are prominently featured in the clip.

Mashup aside, here's a list of the top trending and music videos for 2013 according to YouTube.

Top Trending Videos for 2013

1. Ylvis - "The Fox (What Does the Fox Say?)"
2. "Harlem Shake (original army edition)"
3. "How Animals Eat Their Food" | MisterEpicMann
4. "Miley Cyrus - Wrecking Ball (Chatroulette Version)"
5. "baby&me / the new evian film"
6. Volvo Trucks - "The Epic Split feat. Van Damme"
7. "YOLO (feat. Adam Levine & Kendrick Lamar)"
8. "Telekinetic Coffee Shop Surprise"
9. "THE NFL : A Bad Lip Reading"
10. "Mozart vs Skrillex. Epic Rap Battles of History Season 2"

Top Music Videos for 2013

2. Miley Cyrus - "Wrecking Ball"
3. Miley Cyrus - "We Can't Stop"
4. Katy Perry - "Roar (Official)"
5. P!nk - "Just Give Me A Reason ft. Nate Ruess" 
6. Robin Thicke - "Blurred Lines ft. T.I., Pharrell"
7. Rihanna - "Stay ft. Mikky Ekko"
8. Naughty Boy - "La La La ft. Sam Smith"
9. Selena Gomez - "Come & Get It"
10. Avicii - "Wake Me Up (Official Video)"