Kelly O is skinny.....

From the waist up.... Osbourne is all ready to make her West End debut in Chicago. She will play Mama Morton for a seven week season running from September 10 to October 27.

Broadway and London producer Barry Weissler said, "We're very excited that Kelly is joining the production. She's internationally recognized, she's unique — it's the perfect match."

Kelly said, "It's been a dream of mine to be in the West End. I can't wait to work with such an amazing cast."

Daily Mail