Kelly Osbourne Leaves Hospital Feeling 'Fine And Naughty'

Doctors give Kelly clean bill of health, find no conclusive results about what caused seizure.

Kelly Osbourne is headed back to work after being released from the hospital on Monday. The 28-year-old "Fashion Police" co-host was rushed from the set of the show on Thursday after suffering a seizure
 and following several days of tests doctors believe the episode was a one-time occurrence.

"After a five-day hospital stay, Kelly Osbourne has returned home and has been given a clean bill of health by her doctor," a spokesperson for Osbourne told E! News.

"Doctors ran numerous tests and determined that this was most likely a onetime episode of which there are no conclusive results. She is looking forward to returning to 'Fashion Police' this week and getting back to business and life as usual."

On Monday, Kelly's mom, "The Talk" co-host Sharon Osbourne, said she was happy that the seizure was caught on tape so doctors could evaluate it for clues. "She's on medications. Nobody knows why she had it — can't figure out a reason why — but she is fine, and naughty," Sharon said.

Kelly seemed to keep her sense of humor while hospitalized, posting a picture of the IV in her arm and tweeting on Sunday, "My life is no like an episode of 'House' = the impending fight against death and the look of fear in everyone's faces!"

Late Monday night she wrote, "Thank you to all the doctors, nurses, medical staff & employees @CedarsSinai Hospital for fixing me enough to go home. It's so nice to be in bed!"

Kelly isn't the only Osbourne facing health issues: Her brother, Jack, was diagnosed with multiple sclerosis
 last year, and Sharon is a colon cancer survivor.