Amanda Shires

Country music has a gender problem. Women only make up 16% of country artists, and even fewer are songwriters.

When women do break into the mainstream — the likes of Carrie Underwood, Miranda Lambert, and Kacey Musgraves — they're often young. The average age of the genre's top female artists is 29 years old.

In 1985, a team of country-music legends formed The Highwaymen, a supergroup combining the talents of Johnny Cash, Willie Nelson, Waylon Jennings and Kris Kristofferson.