By Breaking Celebrity News Staff

Jennie Garth arrived back in Los Angeles late Friday night, and her new super skinny appearance is continuing to shock fans.

The former Beverly Hills 90210 star was traveling with her daughter Luca, Lola and Fiona, returning from New York where she made a number of promotional appearances.

Garth is in the midst of a divorce from Peter Facinelli. It was the Twilight star who initiated the split, knocking Jennie "for a loop," she admitted on her reality show, Jennie Garth: A Little Bit Country.

Nutritional expert and CEO of NutriFit Jackie Keller told Breaking Celebrity News that plummeting pounds is a common side effect after a marriage breaks down.

"Some women (and men!) do lose their appetite under emotional stress, and the net result can be weight loss, or other poor health habits such as smoking, drinking and inadequate sleep, etc," she explained.

"It's natural to go through an adjustment period, and always best if the emphasis is more on positive aspects of life, like her beautiful daughters and perhaps other projects that she's involved in," said the health expert.