If you're looking to see the most popular YouTube videos of the week, look no further.
Once again, we're bringing you the week's most-watched videos, hot off the charts via YouTube Trends, a feature launched by YouTube that aggregates the site's video stats and draws upon "the wisdom of top curators across the web" to offer visitors a look at real-time trends among the YouTube community.
So what did the web go wild over this week? Barack Obama asks the "real Mitt Romney" to please stand up, a gamer from the present travels back to 1998 to give his younger self a preview of the future of gaming, the "Prometheus" movie trailer wows -- and much, much more.
Watch the 9 most popular YouTube videos of the week and vote for your favorites. Then, check out last week's picks, here. For more top videos, browse our slideshow of the most-watched YouTube videos from 2011.