A couple months ago, Beyoncé took to Fallon to perform a live version of song of the year/video of the year candidate "Countdown" with Fallon's houseband, the Roots. Though recorded in July, it didn't air until recently; check out the video after the jump, which also includes some awkward Chris Martin clapping at the end. [videoembed size="full_width" alignment="center"][/videoembed] And here's ...