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Loretta Lynn is mourning the death of one of her children.  Nashville's says the country legend's 64-year-old daughter Betty Sue Lynn passed away Monday. 

She had been battling emphysema, and died of complications of the disease. 

Betty Sue had two children of her own, as well as five grandchildren.  She's the second of Loretta's six children to die before their mother.  Loretta's son Jack drowned in 1984, at the age of 34.

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