Ashton Kutcher arrived back in Los Angeles Thursday night after partying in Brazil while his estranged wife Demi Moore battles to regain her health.

Kutcher, 33, was photographed leaving LAX Airport with friends. He did not answer repeated questions shouted at him by paparazzi.

RadarOnline.com has previously reported the Two and a Half Men star was out of the country while Moore was hospitalized after she collapsed after having a seizure.

Demi Moore had a seizure Monday night before she was rushed to the hospital and is being treated for anorexia, among other substance abuse issues, Radaronline.com has exclusively learned.

The 49-year-old Ghost star has become frighteningly thin since her split with husband Ashton Kutcher, and a source close to the actress described what happened to her.

"She collapsed after having an epileptic seizure," the source said about the frightening medical emergency.

Her dramatic weight loss has caused much speculation about her health and the source confirmed that this is one of the issues she is seeking treatment for.

Michael Lohan collapsed during an Alcoholic's Anonymous meeting on Tuesday and was taken to the hospital, RadarOnline.com has exclusively learned.

"Michael started to feel light headed during his meeting so he walked outside, and that's when he collapsed," a source close to the Lohan patriarch told RadarOnline.com.

"He was taken in an ambulance to Palm Beach Gardens Hospital where doctors found another blood clot in his lung."

The Price Is Right's former host Bob Barker is back at home Friday after being hospitalized following a collapse at a shooting range in Los Angeles on Thursday afternoon, RadarOnline.com has learned.

The game show host, 86, felt better after being tended to by Thursday evening, his publicist Henri Bollinger told NBC. He was sent home, and told to rest up.