Naomi Judd, Grammy-winning singer and mother of Wynonna and Ashley Judd, has died at 76

Naomi Judd, the Kentucky-born singer of the Grammy-winning duo The Judds and mother of Wynonna and Ashley Judd, has died. She was 76.

The sisters confirmed their mother's death on Twitter.

"Today we sisters experienced a tragedy," they said in a statement posted from the Judds' official Twitter account. "We lost our beautiful mother to the disease of mental illness. We are shattered. We are navigating profound grief and know that as we loved her, she was loved by her public. We are in unknown territory.