PopEater

Chynna Phillips, the half-sister of Mackenzie Phillips, checked herself into rehab for anxiety, her manager tells PEOPLE. "After much thoughtful deliberation Chynna Phillips has checked herself into an undisclosed treatment facility for anxiety," her manager said in a statement.

"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."

Production has been halted on the hit Fox show '24' as Kiefer Sutherland undergoes elective surgery to deal with a ruptured cyst near one of his kidneys, PEOPLE reports. "We are temporarily suspending production of '24' while our friend and colleague Kiefer Sutherland undergoes a medical procedure," the network says in a statement. "We hope to resume production shortly and do not anticipate any disruption in the broadcast of this season's episodes."

The Brittany Murphy Foundation, which is run by Murphy's husband, Simon Monjack, and mother, Sharon Murphy, hasn't filed the necessary documents to qualify as a charity or nonprofit group and is now returning all donations. On Sunday, TMZ first reported that the foundation was not registered as a charity with the IRS or the state of California, as required by law. The foundation has issued an apology letter on its official Web site. "In an effort to get the foundation off the ground quickly, we established it as a private foundation with plans to apply for nonprofit status down the road. However, after some thought, we have decided instead to wait until we have our nonprofit status approved before proceeding to ensure that we can truly honor Brittany's charitable desires. Any donations made up until this point will be returned until we have all our paperwork solidified," the letter reads.

Michael Jackson's three children, Prince Michael I, 12; Paris, 11; and Prince Michael II ("Blanket"), 7, have been trying to gain a sense of normalcy since their father's death in June. With the support of their grandmother and guardian Katherine Jackson, the children are "slowly coping."

One source tells PEOPLE that Prince and Paris have become more confident over the past several months. "It would have been hard to imagine them going out in public or showing up at someone's house hanging out and playing video games before [their father died]," says the source. "That had a lot to do with Michael, because every time he showed up there were bodyguards and [chaos]. And now, not so much. It feels much more normal and they've adjusted really well to that."

Heidi Montag stepped out on the red carpet this weekend at PURE nightclub in Las Vegas, debuting her enhanced new body. After undergoing 10 procedures in one day, Montag is thrilled with her new look, saying Saturday that it was "the best decision I've ever made," according to PEOPLE.

"My favorite part, I think one of them is my chin. I think that's what I was so excited about," Montag, 23, said.

"And I love my boobs, but I still want to improve. I didn't get them as big as I originally wanted."

Doug Fieger, leader of the power pop band The Knack, who sang on the 1979 hit 'My Sharona,' died Sunday. He was 57. Fieger died at his home in Woodland Hills near Los Angeles after a long battle with cancer, according to The Knack's manager, Jake Hooker. Fieger battled cancer for six years.

In 2006, he underwent surgery to remove two tumors from his brain. He is survived by a sister, Beth Falkenstein, and a brother, Geoffrey Fieger. A memorial service for friends and family is being planned.

Jennifer Garner's ferocious attack on an anti-Valentine's Day pinata was more than the high point of "Valentine's Day." For many, it summed up their frustation with this Hallmark holiday.

The star was even asked to reprise the anger live on the 'George Lopez Show,' where she said Valentine's Day can be "an obnoxious holiday" before beating the stuffing out of another heart-shaped pinata.

However, Garner insists that past Valentine's Day aggression was not part of the scene's preparation. During the movie's press junket, Garner said she had professional baseball on her mind when she shot the baseball bat scene.

"I like a batting cage as much as the next girl," she said of her preparation.

The wife of Red Sox-crazy Ben Affleck listed some of the players she channeled during that moment.