Just days before Miranda Lambert and Blake Shelton’s divorce became public knowledge, Lambert broke down while singing "The House That Built Me" in Cheyenne, Wyoming. The moment may have foreshadowed what was to come.

It was Shelton who let Lambert cut the career-breaking hit instead of him. It’s arguably the most important song of her country music career — one of her two CMA Song of the Year winners.

“I bet you know the song, so y’all sing it for me,” Lambert tearfully asks of her fans in video released by TMZ. “It starts with ‘Mama cut out pictures,’ can you do that for me?”

That’s the powerful song’s second verse — fast-forward to find the audience helping her finish the song. "The House That Built Me" appeared on Lambert’s 2009 Revolution album, and she has cried while singing it live before. This time, she couldn't seem to get words out, letting her crowd take over while she wiped away tears.

Lambert and Shelton announced they were divorcing after four years of marriage on Monday (July 20), asking for privacy and compassion in a joint statement. The news came as a shock to fans and the country music community. No reason for the split was provided. The couple married in May 2011 after five years of dating. They had no kids, and there were no public signs of marital stress prior to the announcement, sans tabloid rumors.

Lambert's next concert is a Roadside Bars & Pink Guitars Unplugged Show at 3rd & Lindsley on July 28. She and Shelton are both set to play WE Fest in Detroit Lakes, Minn. next month.

See Blake and Miranda's Relationship Timeline

Blake and Miranda Announce Their Divorce