Natalie Cole, whose hit songs included the duet Unforgettable with her father Nat "King" Cole, has died aged 65.
The Grammy-winning singer died on Thursday night at a hospital in Los Angeles, her publicist told the Associated Press news agency.
She rose to fame as an R&B artist with tracks such as This Will Be and Inseparable.
The singer had recently cancelled a series of performances, including one on New Year's Eve.
"Natalie fought a fierce, courageous battle, dying how she lived... with dignity, strength and honour. Our beloved mother and sister will be greatly missed and remain unforgettable in our hearts forever,'' said a statement from her son Robert Yancy, and sisters, Timolin and Casey Cole, AP reported.
US civil rights activist Rev Jesse Jackson was among the first to tweet his condolences: "#NatalieCole, sister beloved & of substance and sound. May her soul rest in peace. #Inseparable."
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