Joan Baez's voice is pure and clean as she did this number in the style of folk song:
http://www.youtube.com/watch?v=GoqiQkibtZY&NR=1&feature=endscreen

An early country song by the Carter family:
http://www.youtube.com/watch?v=22R5IgxP_pg
This is country? You probably would ask.
I guess it's an early form of country back in the '30s.

One member of the Carter family, June Carter, herself a singer, later married Johnny Cash.
Soon after they both passed away in 2003, the movie "Walk The Line" was made in 2005 portraying their story.
Actress Reese Witherspoon won the 2006 Oscar Best Actress Award for playing the role of June Carter in that film:
http://www.youtube.com/watch?v=4P0smMYhLsg