Naomi Judd, part of the Grammy-award winning country music duo The Judds, is dead at 76.

Judd's daughters, "Today we sisters experienced a tragedy. We lost our beautiful mother to the disease of mental illness,"

Naomi Judd recorded and performed as one of the most successful mother-daughter acts in country music before the group stopped performing in the early 1990s

The Judds' hits included 1984's "Mama He's Crazy,

Naomi Judd was born Diana Ellen Judd on January 11, 1946, in Ashland, Ky.

gave birth to Wynonna the week of her high school graduation.