Here's the brand spanking new video for Miranda Lambert's latest single Mama's Broken Heart. The song was written by Kacey Musgraves (along with Shane McAnally and Brandi Clark). Word is that Kacey was initially reluctant to let her old songwriting friend have it, but eventually she relented and let Miranda record it with the stipulation that she sing the song's awesome harmonies. Works for me. Anyway, I love this video. Miranda does crazy real well. Blake better watch himself.