Best 2007 YouTube Videos

Videos by a self-styled Obama Girl, a fan's tearful defense of Britney Spears (Watch the second video: Chris Crocker's "Leave Britney Alone") and an attack by a herd of buffaloes on a pride of lions, were among the most popular clips on YouTube.com in 2007.

But the videos were not just popular because of the millions of times they were seen on the YouTube.com Web site, which allows users to post their homemade videos. The rankings, released by YouTube on Thursday, took into account the most shared, most discussed, top rated and general popularity of clips to determine which ones people were thinking and talking about most.

Here you have the three best YouTube videos in 2007:

Best 2007 YouTube Videos - Los mejores videos 2007 de YouTube - Best and popular YouTube videos