Grammy-winning musician was recently diagnosed with ALS.

The condition has also left the singer with speaking difficulties.

She is also unable to sing and is currently receiving treatment.

Flack is known for releasing classic hits like "Killing Me Softly," "Feel Like Makin' Love,"; "Where Is the Love."

Earlier in the year, she contracted a mild case of Covid-19.

A documentary about her life, titled Roberta, is set to premiere at a screening in New York this month.

The documentary will later debut on PBS on January 24

Flack plans to publish a children's book, The Green Piano: How Little Me Found Music.

The book, which becomes available on January 10, will tell stories about her childhood.