Joan Rivers Death: Kelly Osbourne Hospitalized After Losing Her Co-Host [Video]

Following the death of Joan Rivers, Kelly Osbourne has been hospitalized.

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Hours after news of Rivers' passing hit the web, her Fashion Police co-host was hospitalized. After receiving care, Osbourne reached out to fans, explaining why she had been hospitalized in New York City on Thursday.

"When you have a cough go to the doctor or you will end up like me! #Pneumonia," Osbourne wrote on Instagram, along with a photo of herself in a hospital bed. In the photo, Osbourne is seen looking a bit worse for wear and holding up a sign, which read, "Why I am in the hospital."

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On Thursday afternoon, after one week at an Upper East Side hospital, Rivers passed away with daughter, Melissa Rivers, at her side. The death came one week after a botched throat surgery resulted in the 81-year-old comedian going into cardiac arrest.

Despite her hospitalization, Osbourne took to Facebook on Thursday, where she shared a message with fans regarding the loss of Rivers.

"[Rivers] was family and I will never forget her," read a snippet of the message. "Laughter will be difficult for a while but when I'm sad, lonely or upset all I will have to do is think of Joan and a smile will cross my face. Laughter is what she gave us and laughter is what she would want us to do in remembrance of her."

Osbourne and Rivers have co-hosted Fashion Police since 2010.

Osbourne also shared a photo of herself and Rivers on Twitter, telling fans life would "never be the same" without her.

Below, check out a clip of Osbourne gushing over Rivers: