"Most people don't know the words to Deck the Halls, so they just go falalalala. I find that disrespectful to Christmas, so I sing all the words. Like this."

M. Spaff Sumsion: Concept and falalalyrics

Macy Lund: Vocals

Robert Lund: Vocals, instruments, production, what have you.

"Deck the Halls" has 1862 lyrics by Thomas Oliphant to "Nos Galan," a 16th-century Welsh carol. (He wrote new lyrics to an existing song? Can you even do that?)