Women in Music 2016

Pentatonix Sets Holiday Special at NBC

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Pentatonix perform during the 83rd Rockefeller Center Tree Lighting on Dec. 2, 2015 in New York City. 

Reba McEntire and Kelly Clarkson also will be featured in the Dec. 14 event.

NBC is gifting viewers with a Pentatonix holiday special.

The hour-long event -- airing Dec. 14 at 8 p.m. -- will feature the Grammy-winning a cappella group singing its favorite Christmas classics.

Reba McEntire and Kelly Clarkson also will appear as special guests, with more to be announced. (Another addition could be Dolly Parton, who has a strong relationship with NBC and previously paired with the group for a "Jolene" cover.)

Pentatonix recently released its third holiday album A Pentatonix Christmas, which debuted at No. 3 on the Billboard Top 200 Chart. The album features the group’s arrangement of the Leonard Cohen classic, “Hallelujah,” which debuted at No. 6 on Billboard’s Top Digital Songs Chart.

This is the first-ever holiday network special for Pentatonix -- the group first rose to fame on NBC's competition series The Sing-Off.

Previous NBC holiday concert specials have featured Clarkson and Michael Buble, among others.

A Pentatonix Christmas Special is executive produced by Brad Lachman Productions, Inc. in collaboration with RCA Records and Pentatonix.

This article was originally published on The Hollywood Reporter.