http://en.wikipedia.org/wiki/Rosie_Nix_Adams

Rozanna Lea "Rosey" Nix (July 13, 1958 - October 24, 2003) was an American singer-songwriter. She was born July 13, 1958, the daughter of June Carter Cash and her second husband Edwin "Rip" Nix, and the stepdaughter of the famous country singer Johnny Cash. She was married to Philip Adams.

Nix was a singer/songwriter and performed as a back-up singer for The Johnny Cash Show, David Grey, and Slim Whitman.

She and Jimmy Campbell, a bluegrass fiddle player, were found dead on a bus in Montgomery County, Tennessee, on October 24, 2003. It was determined that the deaths were caused by carbon monoxide from the six propane heaters, used without ventilation, in the bus. Nix was 45 when she died.

Nix was buried near her mother and stepfather (who had both died earlier that same year) in the Hendersonville Memory Gardens, Hendersonville, Tennessee.