Peg - Steely Dan - The Making Of
I've heard of bands slapping together an album in a matter of days, but these guys spent more time than that on a single song. They took meticulousness to extremes with this song. They went through seven guitarists just to get the solo and then there's the nuance they were after with the vocals. It paid off with an extremely memorable song, but it took a lot of work to get there!
Thanks ergot for bringing up this band in another thread!