I've been mad about Pentatonix since they won The Sing-Off in 2011 and can't get enough of them at the mo.
I've spent the week listening to their latest Christmas album and I'm blown away by their skills yet again.
They're definitely the best a cappella group in the world - every song makes my mind boggle at their voices.
Here's a selection of some of my fave festive songs from all their albums... the first is a tribute to Leonard Cohen from this year's album A Pentatonix Christmas to blow you away:
The way they sing "dark" - LOVE it...
Here's a link to more:
Pentatonix Christmas songs.
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