Don't bother reading this until you've watched the above video. The headline says it all, and I tend to eschew the use of the word "epic."
Now that you're finished with the video: That was crazy, right? Who knew being the frontman for any kind of music was just about how well you strut your stuff? Well, everyone, I guess. And cheers to Stephen Merchant for proving that British people aren't all awkward befuddlement. Beyoncé Z? I did not see that coming.
As Fallon put it, the two clear winners were Merchant and Joseph Gordon Levitt. Oh, and the audience, because that shit was hilarious.