How do you make the "Mad Men" theme — "A Beautiful Mine" by RJD2 — even cooler? You add a vocalist (Allison Williams) and the lyrics to the song "Nature Boy," written by Eden Ahbez and made famous by Nat King Cole.
Ralph Arend directed this video, which was shot in one take and performed completely live. This was produced and uploaded by a group that calls itself "VideosRecordedLive" — their mantra being, "No dubbing…no autotune…just pure vocals with live music and one, continuous camera shot – no cutting. Just a bunch of film/music nerds getting together to do something ambitious."
UPDATE: Holy moly, I didn't realize that was NBC News anchor Brian Williams' daughter!