Miranda Lambert fought back tears as she sang "The House That Built Me."
Just days before announcing her split from Blake Shelton, the 31-year-old country singer broke down during her Cheyenne Frontier Days concert in Wyoming. "The last thing someone wants to do is cry in front of 19,000 people," she told the audience as she tried to keep from crying while singing the ballad. Lambert also did not appear to be wearing her wedding ring.
PHOTOS: Blake Shelton's Wedding Ring On Display One Day Before Miranda Lambert Divorce Bombshell
Shelton also performed at the event, and was spotted wearing his ring.
"The House That Built Me" has a lot of meaning for the former couple. Shelton, 39, was originally supposed to perform the song but upon Lambert hearing it, she wanted to record it instead.
"I took one look at her and just said, 'If you have this strong of a reaction to a song, you need to record it!'" Shelton told People in 2011.
Clearly, it still has an impact on her.
"After the song was over, she went straight to the next song which was more upbeat, but she ended the song saying thank you and she loved us," a fan in the audience who posted the Instagram video above told ET. "Everyone around me was in tears, especially myself, because the words of this song ring so true to my life story."
The track was released in March 2010 off her album Revolution and is one of Lambert's biggest hits. In 2011, the song earned her a GRAMMY for Best Female Country Vocal Performance.
WATCH: 9 Times Miranda Lambert and Blake Shelton Expressed Their Head Over Heels Love for One Another
This isn't the first time Lambert has gotten emotional while performing the song. At the Oklahoma Benefit Concert in 2013, she also teared up.
Lambert and Shelton divorced after four years of marriage. "This is not the future we envisioned," reps for the singers said in a statement to the Associated Press. "And it is with heavy hearts that we move forward separately. We are real people, with real lives, with real families, friends and colleagues. Therefore, we kindly ask for privacy and compassion concerning this very personal matter."