Callie Khouri knew that folks in country music were enjoying her show “Nashville” when she went to the CMA awards last fall and the musicians started telling her stories. “ ‘Oh honey, we need to talk,’ ” she says with a laugh at what people would say when they approached her backstage.

They’ve also begun asking about cameos on the music-filled ABC drama, starring Connie Britton and Hayden Panettiere as dueling divas of different generations.