Sharon Osbourne 'in good spirits' following chemotherapy

Sharon Osbourne is reportedly in "very good spirits" following her first session of chemotherapy.

Her treatment is the first step of a three-month course in her battle with cancer of the colon.

An Osbournes spokesperson told USA Today that she was "very upbeat."

It had been thought her cancer was confined to her colon, but the disease was found to have spread following an operation on July 3.

Sharon's fight with the disease will be chronicled on MTV on the second series of The Osbournes.