On last night's episode of the Late Show With David Letterman, the Kills brought a stripped-down, no-backing-band rendition of their gooily gorgeous ballad "The Last Goodbye" to the stage. Allison Mosshart's hair looked extra-nuts, and she sounded amazing. It's one of the stronger late-night performances in recent memory, and you can watch it below. [videoembed size="full_width" alignment="center"][/videoembed] The Kills' album ...