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Pentatonix recently released their new Christmas album. Here are their top 12 most-viewed Christmas songs on YouTube of all-time.

Pentatonix has been a wildly popular a cappella group, gaining notoriety after winning the singing-competition show "The Sing-Off" back in 2011. The quintet currently has over 14 million subscribers.

Much of Pentatonix's success is due to its modern takes on Christmas classics. Some of the group's most popular videos have been holiday-themed.

Pentatonix released its new songs "Away in a Manger" and "Deck the Halls" in October as part of a new album, "A Pentatonix Christmas." The full album can be found below.

The album featured bass vocalist Matt Sallee in place of previous bass Avi Kaplan.

Kaplan left the group in May due to personal reasons. He explained that he could "no longer continue at this pace" and expressed desire to spend more time with friends and family. Kaplan's farewell video was posted on the Pentatonix Facebook page.

Another member of the group, Kirstin Maldonado, is reportedly working on her solo debut, according to Hugh McIntyre, a Forbes contributor. Other band members also are beginning attempts to pursue personal projects.

In case we may never see the original band back together, here's a list of the group's top 12 most-viewed Christmas videos on YouTube.

Check them out below.

'Little Drummer Boy'

Views: 154 million

Likes / Dislikes: 968,000 / 27,000

'Mary, Did You Know?'

Views: 152 million

Likes / Dislikes: 1,000,000 / 24,000

'Carol Of The Bells'

Views: 103 million

Likes / Dislikes: 800,000 / 18,000

'White Winter Hymnal'

Views: 59 million

Likes / Dislikes: 432,000 / 8,000

'Angels We Have Heard On High'

Views: 36 million

Likes / Dislikes: 233,000 / 5,000

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'Winter Wonderland/Don't Worry Be Happy'

Views: 36 million

Likes / Dislikes: 312,000 / 5,000 K

'Dance Of The Sugar Plum Fairy'

Views: 35 million

Likes / Dislikes: 411,000 / 5,000

'That's Christmas To Me'

Views: 34 million

Likes / Dislikes: 258,000 / 3,000

'Silent Night (Live)'

Views: 27 million

Likes / Dislikes: 180,000 / 3,000

'God Rest Ye Merry Gentlemen'

Views: 25 million

Likes / Dislikes: 333,000 / 4,000

'The First Noel'

Views: 21 million

Likes / Dislikes: 203,000 / 3,000

'O Come All Ye Faithful'

Views: 14 million

Likes / Dislikes: 194,000 / 3,000