On the 1999 album Mr. Hankey's Christmas Classics, the animated character Adolf Hitler delivers a satirical rendition of the traditional carol O Tannenbaum. This recording is part of the South Park Related Recordings series, which features various characters performing songs in their distinct voices. The track exemplifies the show's signature style of using familiar holiday music to deliver sharp social and political commentary through absurdity. By having Hitler sing the song, the recording highlights the character's role as a vehicle for dark humor and critique, blending the innocence of the original tune with the menacing persona of the historical figure. It remains a notable example of how the series utilized music to enhance its narrative and comedic impact during the late 1990s.