Christmas Time is Once a Year

"Christmastime is Once a Year" is a song sung in the Season Eight episode, "Woodland Critter Christmas". The song is sung three times in the episode; once at the beginning, once as the Mountain Lion Cubs are learning how to do abortions, and once during the credits.

Background
As the narrator informs Stan Marsh that he has to bring the lion cubs to the abortion clinic, and transports him and the cubs to the clinic, so they can learn how to kill the Anti-Christ. After a brief exchange with the abortion doctor, he happily agrees and begins teaching the cubs, as Christmas music plays over.

After the story concludes, and Stan celebrates "the best Christmas ever for the boy in the red poofball hat", Kyle Broflovski is shown in the hospital where he dies from AIDS, caused by the abortion he received by the lion cubs to remove the Anti-Christ from inside of him. Kyle berates Eric Cartman for the story's ending and the credits roll, as the Christmas music from before plays.

Lyrics
First Version: Christmastime is once a year. Every critter holds it dear. Every animal big or small, Christmas means so much to us all. Second Version: Christmastime is once a year. Every critter holds it dear. Every animal big or small, Christmas means so much to us all. It's once a year, it's Christmastime! And it happens once a year. It's once a year, it's Christmastime! When we hear about how Christmas only comes Once a year.

Third Version: Christmastime is once a year. Every creature holds it dear. Every animal big or small, Christmas means the world to us all. It's once a year, it's Christmastime! When we hear about how Christmas only comes Once a year.