'Unforgettable': Singer Natalie Cole dies at 65

Singer Natalie Cole, the daughter of jazz legend Nat "King" Cole who overcame substance abuse to find stardom in her own right, has died, her family said Dec. 31, 2015. She was 65.

The Grammy-winning singer, who had longstanding health issues including complications from a kidney transplant, died on New Year's Eve at a Los Angeles hospital.

"Natalie fought a fierce, courageous battle, dying how she lived - with dignity, strength and honor," her family said in a statement.

Quoting her most identifiable song, the family said: "Our beloved mother and sister will be greatly missed and remain UNFORGETTABLE in our hearts forever."

In contrast to the rags-to-riches stories of many other artists of her generation, Cole was raised in relative affluence in Los Angeles. Her career was inextricably linked to that of her father.  She had her first break singing in clubs as the daughter of Nat "King" Cole, but struggled to find her niche as she chose a sound far more modern than her father's standards.

After delving into R&B, soul and pop, Cole achieved her greatest success in 1991 by returning to some of the classics sung by her father.

Her album, "Unforgettable... With Love," won the Grammy for Album of the Year and has sold more than seven million copies in the United States.

In a technical feat considered novel in the day, Cole sang the title track - with its elegant, string-backed opening line "Unforgettable, that's what you are" - in a duet with her father who had died of cancer in 1965.

Cole first made a name for herself in 1975 with the debut song "This Will Be (An Everlasting Love)" and the album and song "Inseparable." The hits helped Cole win the prestigious Grammy for Best New Artist, one of a...