Jennifer Nettles and Idina Menzel performed a duet of "Let It Go" for CMA Country Christmas.
The fifth annual holiday special was filmed Nov. 7 in Nashville, and aired Monday on ABC. Nettles returned to host the program, and was joined onstage by Menzel, who voiced Queen Elsa and sang "Let It Go" in Disney film Frozen.
Nettles is best known as the lead vocalist of Sugarland, and released her fourth studio album, The Incredible Machine, with Kristian Bush in 2010. Her first solo record, That Girl, was released in January, and debuted at No. 1 on the Billboard U.S. Top Country Albums.
Menzel released her third studio album, I Stand, in 2008, and followed up with live album Barefoot at the Symphony in 2012. She debuted Christmas album Holiday Wishes in October, and recently hinted there is a Frozen sequel in the works.