British comedian Richard Sandling has put together a staggering compilation here, taking seasons 1 through 4 of "Mad Men" and making the cast sing Rick Astley's all-time classic "Never Gonna Give You Up." You can watch. It doesn't count as a Rick Roll.

One has to wonder now, as one often does after seeing videos like this, about the poor mental state of Mr. Sandling. How does someone spend so much time—and you've got to think this took a month or more—focused on one song? Especially "Never Gonna Give You Up?" Such dedication to the craft. I'm always impressed. 

H/T: Laughing Squid