Pentatonix cover 'God Rest Ye Merry Gentlemen' on Jimmy Kimmel and it is magical!

When it comes to Christmas songs, Pentatonix kills it!

Last year the a cappella group covered everything from "The First Noel" to "Silent Night," but their latest live performance of "God Rest Ye Merry Gentlemen" has totally blown us away.

The cover appears as track two on their new album, A Pentatonix Christmas.

According to the Oxford Dictionary of Music, “God Rest Ye Merry Gentlemen” is one of the oldest English Christmas carols.