Instagram/Kacey Musgraves & Miranda Music Kacey Musgraves reveals the real story behind her feud with Miranda Lambert over the song "Mama's Broken Heart" and how they reconciled to collaborate. March 14, 2026 AceShowbiz - Kacey Musgraves recently spoke candidly about a long-rumored feud with fellow country singer Miranda Lambert, revealing that the tension between them was very real before they reconciled to collaborate on a new song.