Kelly Osbourne seizure cause being looked into by doctors

Thursday (March 7) during a taping of E!'s show "Fashion Police," Kelly Osbourne suffered what appeared to be seizure on stage. She reportedly said she did not feel well and then fell out of her hosting chair, shaking on the ground.

Osbourne was then taken to a nearby hospital. A spokeswoman tells news outlets, "She will be staying overnight for observation as a precautionary measure."

On Twitter, Osbourne adds, "Thank U all 4 UR beautiful well wishes. yes I did have a seizure they are just trying to figure out why?" and she tweeted the photo as well.

Seizures can be caused by everything from epilepsy to a fever to low blood sugar to an infection, such as meningitis. It will probably be a while before doctors know what caused Osbourne's collapse and seizure. Hopefully it's nothing serious.