A statement issued by her publicist, Lizzie Grubman, says Phillips checked herself into the facility "after much thoughtful deliberation."
Grubman says Phillips is "looking forward to her recovery." The statement asks that people respect Phillips' privacy and the privacy of her family.
Phillips, of the pop group Wilson Phillips, is married to actor William Baldwin. The couple have three children.
She is the half-sister of former child actress Mackenzie Phillips, who claimed in a 2009 memoir that she had a decade-long sexual relationship with their father, pop star John Phillips of the Mamas and the Papas.
