In this month's episode, we discuss the origins and history of the song "The Twelve Days of Christmas". 
Check out this Snopes article that fact checks the theory that there is are secret, coded Christian references in the song.
Versions played in this episode:

Portland Choir and Orchestra
Perry Como
Roger Whittaker
John Denver and the Muppets
Ray Conniff Singers
Straight No Chaser
Pentatonix
Jacob Miller (reggae style) 
Mob Vibe (trap style)
Relient K (pop/punk style)
Sara Evans (country style)
Goldfinger (ska/punk style)

Parody versions played:

Twisted Sister
Bob and Doug McKenzie
Allan Sherman
Bob Rivers (The Twelve Pains of Christmas)
Jeff Foxworthy (The Twelve Redneck Days of Christmas)