Birthday Dethday is a song featured in season one of the show, during the episode, "Birthdayface". It is also on The Dethalbum. Birthday Dethday is a song sung/played to Murderface on his birthday. Shortly after the song is played, and Jean Pierre places Murderface's Mercury-frosted cake for all to eat (and die a short time later), the Queen of Denmark dies due to Mercury poisoning.