Country/pop singer Linda Ronstadt—known for songs such as “You’re No Good,” her cover of “I Can’t Help It If I’m Still in Love With You” and “When Will I Be Loved,” and for her collaborations with artists like Emmylou Harris and Dolly Parton—announced on Friday that she is suffering from Parkinson’s disease. The disease has left her unable to sing.

In an interview with AARP Magazine, 67-year-old Ronstadt said she had been diagnosed with the disease eight months ago. Ronstadt said the symptoms of the disease started appearing eight years ago, but she attributed them to a tick bite and side effects from a surgery she had undergone. “I couldn’t sing, and I couldn’t figure out why,” she said. “I knew it was mechanical. I knew it had to do with the muscles, but I thought it might have also had something to do with the tick disease that I had. … Then I had a shoulder operation, so I thought that’s why my hands were trembling.” 

“No one can sing with Parkinson’s disease, no matter how hard you try,” Ronstadt said.

Ronstadt has a new memoir, Simple Dreams, coming out on Sept. 17.