Marlena Shaw, the voice behind the famous tune “California Soul,” died Friday, Jan. 19 at age 81, her family said.

Shaw’s daughter, MarLa Bradshaw, confirmed her death to Fox News Digital, after making a video announcement on Facebook. “It’s with a very heavy heart for myself and my family I announce that our beloved mother, your beloved icon and artist, Marlena Shaw has passed away,” she shared.

“She was peaceful. We were at peace,” Bradshaw said.

Bradshaw did not disclose her mother’s cause of death, though she alluded to hardships in the last three years. Shaw had just celebrated her 81st birthday in September. Bradshaw told Fox News Digital that the family was “securing a date for her celebration,” and more details would be released when that was confirmed.

“She went listening to some of her favorite songs,” Bradshaw said of her mother. “Right now she’s at peace. She’s in heaven.”

Caroline Thayer is an entertainment writer for Fox News Digital. Follow Caroline Thayer on Twitter at @carolinejthayer. Story tips can be sent to [email protected].