Watch Jennifer Nettles Sing ‘Go Rest High On That Mountain’ For Those Lost On 9/11

Jennifer Nettles commemorated the 25th anniversary of the attacks of Sept. 11 with a classic country song about loss, grief and mourning.

The Sugarland singer was in New York City for the 25th Anniversary Commemoration Ceremony on Friday (Sept. 11), where she sang for an audience that consisted of families who lost loved ones at or as a result of the tragedy.

Watch Jennifer Nettles Sing "Go Rest High On That Mountain" at the 9/11 25th Anniversary Commemoration Ceremony

It was an emotional performance for Nettles and the audience alike.

Read More: 10 Country Songs Inspired By World Tragedy

She sang "Go Rest High" at the site of the tragedy, in an outdoor performance, backed by a keyboard and gentle vocal harmonies.

What Did Jennifer Nettles Say About Singing For the 25th Anniversary of Sept. 11?

In a social media post where she shared a clip of herself rehearsing for the performance, Nettles reflected on the gravity of singing for the anniversary of one of the nation's greatest tragedies.

"Those of us who were alive then all remember where we were when it happened," the singer wrote.

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"It is always hard to sing within the presence of, and while holding, such emotion. So many sad hearts in front of you," Nettles continued.

Read More: 30 Powerful Country Songs About Death + Grief

"Emotion 'catches in your throat,' as they say," she wrote. "The voice is sacredly situated between the head and the heart. And that is precisely why, even though it may be hard, we must sing through the sadness. It was my honor to try and offer comfort and connection to these precious people."

Why Did Jennifer Nettles Choose "Go Rest High On That Mountain" For Her Sept. 11 Tribute?

It's one of country music's most poignant songs about grief.

In her post, Nettles described "Go Rest High" as an "amazing modern hymn," and said that the original writer and recording artist, Vince Gill, gave her his blessing to sing it that day.

Read More: Hear Vince Gill's 'New' Final Verse to 'Go Rest High On That Mountain'

Gill began writing the song after Keith Whitley's death from alcohol poisoning in 1989, but he didn't finish it. He later told People that he felt awkward about the song, as he and Whitley were only casual friends.

But four years later, when Gill's older brother Bob died of a heart attack, he revived the song and wrote a chorus and second verse. The song won CMA and Grammy Awards, and it became a staple of country music memorial ceremonies. Gill and Patty Loveless sang the song at George Jones' funeral.

On the 25th anniversary of the tragedy of Sept. 11, many country stars remembered the day by sharing tributes. Lainey Wilson performed "Amazing Grace" for a 25th anniversary tribute special airing on ABC.