Part of a joint running joke, Stephen Colbert sang "Friday" on Jimmy Fallon's show last night, covering the Rebecca Black video that has become a viral sensation - more than 75 million hits - for the wrong reason: everybody hates it. Backed by The Roots and surprise guests, wearing a tux and sounding not at all like a teenaged girl, Colbert proved that the song really is laughable.
The stunt was part of Colbert and Fallon's fake bet, which raised money to send classroom material to schoolkids through DonorsChoose.org, so at least Colbert had a good excuse. Here's his version.
And if somehow you've missed, it, here's the deeply annoying original.