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Sharon Osbourne says it's still unknown why she passed out during an incident in December at an allegedly haunted site in Santa Paula, California.
Ozzy Osbourne's manager and wife of 40 years was released from the hospital a few days later, writing that she was "Back home and doing great."
Sharon returned to her show, TalkTV, on Tuesday and was asked to elaborate on what happened.
"I wish I could, but I can't," she told JJ Anisiobi. "It was the weirdest thing. I was doing some filming and suddenly, they tell me that I [passed out] for 20 minutes. And I was in hospital. I went to one hospital. They took me to another hospital, and I did every test over two days, and nobody knows why."
The Osbournes — Sharon, Ozzy and their son Jack Osbourne — were filming at the infamous Glen Tavern Inn when the incident occurred, possibly for a new episode of Jack's show The Osbournes Want to Believe.
The hotel has been previously featured on numerous paranormal television shows, including Ghost Adventures and The Dead Files.