Peaceful Days [Chrono Trigger] (Octet)Yasunori Mitsuda
Pa Paya [Final Fantasy XIV] (Nonet)Masayoshi Soken
One Horse Open Sleigh (Jingle Bells) (Duet)James Pierpont
My Favorite Things [The Sound of Music] (Quintet)Richard Rodgers
My Eyes [Dr. Horrible's Sing-Along Blog] (Sextet)Jed Whedon
Melodies of Life [Final Fantasy IX] (Trio)Nobuo Uematsu
Lion's Pride [World of Warcraft] (Decet)Jason Hayes
Kidnap the Sandy Claws [Disney Nightmare Before Christmas] (OcteDanny Elfman
Jingle Bell Rock (Duet)Joseph Carleton Beal and James Ross Boothe
It's Beginning to Look a Lot Like Christmas [Pentatonix] (SextetMeredith Willson
How Far I'll Go [Disney Moana] (Quartet)Lin-Manuel Miranda
Hedwig's Theme Variation [Harry Potter] (Trio)John Williams (more information in video description)
Happy Birthday (Quartet)Patty Hill and Mildred Hill
Greensleeves (Duet)Traditional English Folk
Frozen Heart [Disney Frozen] (Septet)Robert Lopez and Kristen Anderson-Lopez
Frosty the Snowman (Duet)Walter Rollins and Steve Nelson
Four-Sided Circle [Final Fantasy XIV] (Quartet)Nobuo Uematsu
Fear of the Heavens [Secret of Mana] (Quintet)Hiroki Kikuta
Father Christmas [The Kinks] (Quartet)Ray Davies
Colors of the Wind [Disney Pocahontas] (Septet)Alan Menken
Color of the Summer Sky [Secret of Mana] (Duet)Hiroki Kikuta
Celes' Theme [Final Fantasy VI] (Quintet)Nobuo Uematsu
Bugler's Holiday (Trio)Leroy Anderson
Born of the Boughs [Final Fantasy XIV] (Octet)Nobuo Uematsu