“That’s what’s brilliant about the country classics,” the singer and songwriter Emmylou Harris has said, “you can’t get too wordy.” Harris sings with a folksy clarity that suits the simplicity of country. But she’s covered the likes of Bruce Springsteen and The Beatles, too. While known for warmly rendering other artists, Harris has become a lodestar of her genre, harmonically guiding Guy Clark, Dolly Parton, and Waylong Jennings. Her voice rings with the beauty of country. —C.J.F.