Betty Sue Lynn, the oldest daughter of country singer Loretta Lynn, pictured, has died. She was 64. Reuters

American country-music singer Loretta Lynn is currently mourning the death of her eldest daughter, Betty Sue Lynn, who died on Monday at the age of 64. According to a statement from the family, as cited by the Associated Press, Betty Sue died from complications of emphysema in Waverly, Tenn., near her mother’s ranch in Hurricane Mills.

Betty Sue is the second of Loretta's children to precede her in death. In 1984, her son, Jack Benny Lynn, then 34, drowned on the family's property. Betty and Jack's father, Oliver Vanetta Lynn, died in 1996.

"The Lynn family appreciates all your prayers, love and support of our family. Betty was Loretta's oldest daughter. Betty leaves two daughters Lynn Markworth and Audrey Dyer," a statement on Loretta's website indicated. Betty Sue Lynn is also survived by five grandchildren.

Loretta, who has six children, was born in the coalfields of eastern Kentucky and chronicled her life in an autobiography and song, both titled "Coal Miner's Daughter." She has written more than 160 songs and released 60 albums, 10 of them reaching the No. 1 spot on the country music charts. Lynn still today is the most awarded woman in country music.