The Christmas Turkey and Gonzo are about to come to blows over the Turkey's incessant flirting with Camilla when Kermit hears carolers. It is Kermit's friends from Sesame Street! After opening with "Here We Come A Caroling!", what traditional Welsh carol, also known as "Nos Galan", does the Sesame Street gang perform? (edited at 11:52 am, December 18, 2015 (PST))
Original question: The Christmas Turkey and Gonzo are about to come to blows over the Turkey's incessant flirting with Camilla when Kermit hears carolers. It is Kermit's friends from Sesame Street! What traditional Welsh carol, also known as "Nos Galan", does the Sesame Street gang perform?
Deck the Hall(s)