Kelly Osbourne was rushed to the hospital Thursday after suffering a seizure. She was filming an episode of E!'s Fashion Police in front of a live studio audience when the incident occurred. Reportedly, an audience member with a medical background immediately came to Kelly's assistance along with crew members and co-star Melissa Rivers who was filling in for mom Joan. Later that night, Kelly took to twitter to let her fans know she was alright but that doctors were trying to figure out what happened.