Kelly Clarkson joins Pentatonix for holiday TV special
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Pentatonix has recently released their seventh album total on Oct. 21 and the set opened at No. 3 on the Billboard Top 200 Albums chart. A Pentatonix Christmas  landed the vocal quintet their sixth top 10 album on the chart and their second leader on Holiday Albums. It follows the 2014 release That's Christmas to Me which debuted and peaked at No. 2. On Dec. 14, NBC will air their first holiday TV special to coincide with the joyous holiday and give fans and viewers an a cappella treat.

The group invited three-time Grammy winner Kelly Clarkson to make an appearance on the special along with Clarkson's own idol, mentor and former mother-in-law Reba McEntire. Since 2011, Clarkson has put herself out there in the Christmas market releasing her first holiday song since winning "American Idol." After season two, the franchise released a Christmas album with Clarkson having her own disc with two songs; "My Grown Up Christmas Wish" and "O Holy Night."

A Pentatonix Christmas  includes favorites such as "White Christmas," "O Come All Ye Faithful," "Merry Christmas, Happy Holidays" and "I'll Be Home for Christmas." The latter is where Clarkson picked up recording seasonal tracks. She released the song as a gift for fans in 2011 on the iTunes Sessions EP which featured live versions of songs from Stronger. It was then added to 2012's Greatest Hits: Chapter One. Finally, in 2013, Clarkson recorded her first ever full-length set Wrapped in Red which was the hit of the season. On the Target deluxe edition, two additional bonus tracks were released including "I'll Be Home for Christmas" to make it a complete album for fans.

Clarkson is no stranger to holiday specials. Following the release of Wrapped in Red, she went on to create "Kelly Clarkson's (Cautionary) Christmas Tale" bringing on stars such as friends Blake Shelton, Trisha Yearwood and of course Reba, the latter two performing a stirring live rendition of "Silent Night" also found on Wrapped in Red. A year later in 2014, Walmart began carrying a re-release with the special added as a bonus DVD.

Pentatonix and Clarkson have already worked together in the past. In 2015, Clarkson embarked on the Piece by Piece Tour with the group opening the show. They previewed a new original song before releasing their first album of new material versus the covers for which they became known (the self-titled album became their first No. 1). During Clarkson's "Heartbeat Song" from the album of the same name, Pentatonix joined her on stage to perform their vocal magic on the track and gave them a major spotlight adding to their already growing fame.

To date, Pentatonix has sold 3.5 million albums in the United States alone thanks to their unique styling. They have only been a major recording act for five years but have taken home two Grammy Awards for their inspiring talent not found in music today.

More details of the TV special will be released at a later date.