Vampire Weekend were minstrels of late night TV in 2008, performing for Conan, Letterman, Kimmel, SNL ... I'm surprised it took Jimmy Fallon over two whole weeks to book them. Last night the band played "White Sky," a live staple we first heard over a year ago. Here's how it sounded with a string section. [videoembed size="full_width" alignment="center"][/videoembed] Vampire Weekend ...