Everyone/Deck the Halls (from A Muppet Family Christmas)

Cast

 * Homestar Runner (from Homestar Runner) as Big Bird
 * Zach Varmitech (from Wild Kratts) as Oscar the Grouch
 * Kermit the Frog (from The Muppets) as Ernie
 * Fozzie Bear (from The Muppets) as Bert
 * Dr. Teeth (from The Muppets) as Count von Count
 * Big Mouth (from Peg + Cat) as Cookie Monster
 * Olie Polie (from Rolie Polie Olie) as Grover
 * CowBella (from Pajanimals) as Kathleen the Cow
 * Sam the Eagle (from The Muppets) as Herry Monster
 * The Cat in the Hat (from The Wubbulous World of Dr. Seuss) as Guy Smiley
 * Pip and Pop (from Bear in the Big Blue House) as Two-Headed Monster
 * Pablo, Tyrone, Tasha, Uniqua and Austin (from The Backyardigans) as Honkers
 * Tigger (from Winnie the Pooh) as Sherlock Hemlock
 * Phineas Flynn (from Phineas and Ferb) as Biff
 * Ferb Fletcher (from Phineas and Ferb) as Sully
 * Mr. Scatterbrain (from The Mr. Men Show) as Forgetful Jones
 * Izzy (from Jake and the Never Land Pirates) as Prairie Dawn
 * Coach Z (from Homestar Runner) Simon Soundman
 * Marvin (from Marvin the Tap-Dancing Horse) as Fred the Wonder Horse
 * Richard (from Peg + Cat) as Elmo
 * Henry Hugglemonster (from Henry Hugglemonster) as Clancy
 * Lips (from The Muppets) as Old McDougal
 * The Grinch (from The Wubbulous World of Dr. Seuss) as Osvaldo, el Gruñón
 * Floyd Pepper (from The Muppets) as Big Jeffy
 * Captain Hook (from Jake and the Never Land Pirates) as Gary Grouch
 * The Jellybean Team (from Maggie and the Ferocious Beast) as Anything Muppets
 * Mike Wazowski, Sulley, Art, Terri and Terry Perry, Squishy, Sheri Squibbles, Don Carlton and Archie the Scare Pig (from Monsters University) as Monsters

Lyrics
Homestar Runner: Merry Christmas from Sesame Street.

Everyone: Merry Christmas!

Homestar Runner: Deck the halls with boughs of holly

Everyone: Fa la la la la, la la la la

Big Mouth: Tis the season to be jolly

Everyone: Fa la la la la, la la la la

Olie Polie: Don we now our gay apparel

Everyone: Fa la la, la la la, la la la

CowBella: Troll the ancient Yule tide carol

Everyone: Fa la la la la, la la la la

Fozzie Bear: Okay, Kermit. You're next.

Kermit the Frog: See the blazing Yule before us

Everyone: Fa la la la la, la la la la

Fozzie Bear: Strike the harp and join the chorus

Everyone: Fa la la la la, la la la la

Zach Varmitech: I will not sing this song!

Everyone: Fa la la la la, la la la la

Dr. Teeth: While I tell of Yule tide treasure

Everyone: Fa la la la la, la la la la

Homestar Runner: Your turn, Sam the Eagle!

Sam the Eagle: Fast away the old year passes

Everyone: Fa la la la la, la la la la

The Cat in the Hat: Hail the new, ye lads and lasses

Everyone: Fa la la la la, la la la la

Kermit the Frog and Fozzie Bear : Sing we joyous, all together

Everyone: Fa la la la la, la la la la Deck the halls with boughs of holly Tis the season to be jolly Fa la la la la, Fa la la la la, Fa la la la la, la la la la

Homestar Runner: Oh, that was fun! I love carols.