This Week in YouTubeHow high will Numa Numa end up? Will we be spared from Bieber? Will Lon Harris even make it through this?

All questions we will have to wait to find out, as This Week In YouTube kicks off its live streaming marathon countdown today at 12:00 PM (PT) of the Top 100 YouTube videos of All Time—in honor of the weekly web show’s 100th episode.

The countdown list is more editorial than view counts, with Lon and his co-hosts Judalina Neira and Kat Steel making the hard cuts. So 217 million-view “Bad Romance” from Lady Gaga may or may not actually show up. But if 3.7 million-view “Big Belly Man” doesn’t make it, we’re tuning it off.

Lon’s not allowed to take a break until it’s all done! With the clips, the guests, the commentary and everything else, it could easily run 8-10 hours. Of comedy gold!

We’re going to open the stream and leave it on all day just to see how it all shakes down. An edited version will no doubt be available tomorrow, but that takes the wonder out of live web TV.

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