When it comes to musical styles, no genre is as popular as country. Since its development in the early 20th century, it has enjoyed a constantly devoted fan base and remains a staple of U.S. airwaves to this day. In fact, almost 100 years after its birth, American radio audiences still listen to country more than any other genre. Naturally, country’s flagship stars have reaped considerable commercial success and gained longevity to rival that of any other style. And while these 20 faces may have changed a lot since their first tastes of fame, their appeal is still as strong ever.