Phillips, 42, is best known as a member of the pop group Wilson Phillips. She is the daughter of the late Mamas and Papas singer John Phillips, the half-sister of actress Mackenzie Phillips and the wife of actor Billy Baldwin. The family made headlines late last year after Mackenzie publicly claimed she was repeatedly raped by John Phillips as an adult during the course of a decade.
Chynna Phillips' manager, Lizzie Grubman, told People.com Monday the mother of three checked into an undisclosed treatment center during the weekend.
"With the full support of her family and friends, she is looking forward to her recovery. We ask that people respect her and her family's privacy at this time," Grubman said in a statement to People.com.
Chynna Phillips released her latest album, "One Reason," a collaboration with Vaughn Penn, last September.