Bluegrass music enjoys a resurgence thanks to the film "O Brother, Where Art Thou?"

Honky-tonk music; the rise and fall of Hank Williams; advent of the Nashville sound.

The Bakersfield sound of Buck Owens and Merle Haggard; the wild music of Willie Nelson and Waylon Jennings.

Female singers who have dominated the industry, including Patsy Cline, Dolly Parton and Tammy Wynette.