ET has the latest...

Grammy award winner Natalie Cole has been diagnosed with Hepatitis C, ET confirms.

The disease was discovered during a routine visit to the doctor and the singer is now undergoing treatment.

"Natalie has had a terrific response to her medication and is now virus negative," her doctor said in a statement.

According to the mag, doctors believe the illness was the result of past drug use, but Natalie said she has no doubt she will make it through this.

"I've been so fortunate to have learned so much from my past experiences," she said. "I am embraced by the love and support of my family and friends; I am committed to my belief in myself and in my abiding faith to meet this challenge with a heartfelt optimism and determination. This is how I intend to deal with this current challenge in my life."