Inside Dolly Parton’s Secret Battle With the Blues!

Can't sleep and reeling from loss of family, friends!

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Dolly Parton speaks during a press conference for the DVD release of Dolly Parton's "Christmas Of Many Colors: Circle Of Love"

Country queen Dolly Parton is waging a desperate battle with mental illness, according to insiders — who fear it could spell the end of her amazing career!

The 73-year-old superstar has confessed to struggling with insomnia, and sources said she’s been haunted by depression that impacts her daily life.

But most disturbing of all, medical experts who have not treated the “Jolene” singer suspect she may have suffered facial paralysis or a stroke that’s affected her speech!

Click through the gallery above for the shocking exclusive details!