Natalie Cole died from heart failure, her family have revealed.
The singer - who is the daughter of Nat King Cole and Maria Cole - tragically passed away at the age of 65 on New Year's Eve in a hospital in Los Angeles.
In a statement, Natalie's family explained the reasons for her passing, saying she suffered from idiopathic pulmonary arterial hypertension after undergoing a kidney transplant in 2009.
This, in turn, led to the heart failure that caused Natalie's death.
The statement read: "[Cole] responded well to pulmonary arterial hypertension-specific agents over many years, during which she performed many concerts world-wide, but eventually succumbed to intractable right heart failure, an outcome that unfortunately commonly occurs in this progressive disorder."