Lambert nearly didn't get to cut this tune. She knew Kacey Musgraves from her days back in Texas, and they used to write together a lot. The pair went their separate ways, but Musgraves reappeared on Lambert's radar after her appearances on Nashville Star
. The country star explained. "I don't think I was supposed to be pitched the song, but her sister actually shot some pictures at mine and Blake's wedding, and she was there, too. At our rehearsal dinner, I went over and asked her, I was like, 'Are you gonna cut this song, or can I have it?' And she was like, 'I'll think about it for a couple of days.'"
Musgraves granted her wish... with some strings attached. "She e-mailed me, and said, 'You can have it, if I can sing harmony,'" said Lambert. "So that's her singin' the harmonies on it - and actually, Kacey Musgraves, she has a new single out called 'Merry Go 'Round
' so she's doin' great on her own now, but I had to actually beg for this song, and so I'm thankful that she gave it to me 'cause I love 'Mama's Broken Heart.'"