Watch Steve Martin, Edie Brickell's Plucky 'Won't Go Back' on 'Fallon'

So Familiar, the second collection of banjo-fueled folk music from Edie Brickell and Steve Martin, hits the racks today, arriving two and a half years after the pair’s Grammy-winning debut, Love Has Come for You. Celebrations for the new release began a little early, though, with Brickell and Martin hitting…