Kelly Osbourne has tweeted to say doctors are "trying to figure out" why the star had her seizure.
Tweeting an image of her arm, from what looks like a hospital bed, she said:
"Thank U all 4 UR beautiful well wishes yes I did have a seizure they are just trying to figure out why?"
More top news
The band dedicated their song Everlast to fan Laura Plane, who died from breast cancer last month.
Resham Khan suffered 'life changing' injuries when she had acid thrown at her through the window of her car.
Heavy rain moves in across Ireland but elsewhere skies clear for a chilly night.