I have to admit, I’m not a big fan of Christmas music. There are a few exceptions, like Mannheim Steamroller’s Stille Nacht (Silent Night) from their 1984 album Christmas.
Pentatonix, the last winner of the discontinued show the Sing Off, has a Christmas EP that is fantastic. They are an acapella group, so just the 5 voices with no instruments, but an amazingly big sound. Below is their video for Carol of the Bells and following that is a link to AOL stream of the EP.