Co-writers Kacey Musgraves, Shane McAnally, Miranda Lambert and Brandy Clark join in to Celebrate there No.1 Song "Mama's Broken Heart" with co writers Kacey Musgraves, Brandy Clark and Shane McAnally performed by Miranda Lambert at Cabana on September 11, 2013 in Nashville, Tennessee.
(September 10, 2013 - Source: Rick Diamond/Getty Images North America)
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