How long did it take for sissy specak to learn loretta lynns songs?

Sissy Spacek took about two years to prepare for her role as Loretta Lynn in the film "Coal Miner's Daughter." During this time, she not only learned to sing Lynn's songs but also immersed herself in the Country Music legend's life and experiences. Spacek's dedication to mastering the songs contributed to the authenticity of her performance, ultimately earning her an Academy Award for Best Actress.