In the battle for the most popular late night show, viewing figures are no longer the only metric. Nowadays there are plenty of ways to measure success, and YouTube is a big one.
And despite the massive popularity of The Late Show with James Corden (which, despite only launching in 2015, has already passed 18 million subscribers), it's The Tonight Show Starring Jimmy Fallon that's become the first to hit the 20 million figure.
In the clip above, Fallon counts down live on a big screen before dancing with a giant bear in a rain of confetti. Why not, eh?
