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Chynna Phillips of the group Wilson Phillips has entered rehab for anxiety.

Phillips, 42, checked herself into an undisclosed treatment facility over the weekend, according to her publicist, Lizzie Grubman.

Phillips’ half-sister, Mackenzie Phillips, came forward last fall with claims of an incestuous relationship with their father, John Phillips of the group The Mamas and The Papas.

Although the revelation was difficult for Chynna, she reportedly checked into rehab for a number of reasons, and is trying to deal with stresses in her life. According to sources, it is not drug or alcohol related.

Chynna’s husband, Gossip Girl star Billy Baldwin, is trying to cope with Chynna’s treatment as best he can. “I don’t feel like dealing with the press when I’ve got my wife in rehab and I’ve got three little kids.”

“It doesn’t really matter to me what’s being said about me in the press,” Baldwin told RadarOnline.com. “I have too many other things to worry about. I don’t care about what other people think. I care about my wife and my children.”

photo: Jody Cortes/WENN