With more than a dozen studio albums to her credit, Ani DiFranco has a strong handle on outspoken, politically charged music. Her latest is Which Side Are You On? Shervin Lainez /Courtesy of the artist hide caption

itoggle caption Shervin Lainez /Courtesy of the artist

Those Darlins' latest album, Screw Gets Loose, finds the group moving toward harder-rocking material. Veta&Theo/Courtesy of the artist hide caption

itoggle caption Veta&Theo/Courtesy of the artist

Loretta Lynn (middle) performs onstage at the CMAs in Novemner. Sheryl Crow (left) and Miranda Lambert sang with her. Frederick Breedon/FilmMagic hide caption

itoggle caption Frederick Breedon/FilmMagic