Top YouTube Videos of 2012

      You've seen them, laughed at them, been amazed by them and shared them with everyone you know. Every month, we watch 4 billion hours of YouTube video, but which were you watching the most in 2012? Kevin Allocca, YouTube Trends Manager, joined us with a look at this year's list and a look at the videos, the entertainers and the moments that captivated the world.

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