Reality TV star Sharon Osbourne credits her battle with colon cancer with saving her from a life spent ignoring the things that truly matter to her.

The wife of Black Sabbath rocker Ozzy was diagnosed with colon cancer in 2002 and, despite coming close to dying on more than one occasion, Osbourne is grateful for the reality check the fatal disease forced upon her.

She has held onto the close friends she made following her diagnosis and places battling cancer only just behind getting married and having children as the most important events in her life.

Osbourne says, "I used to take life for granted and I didn't appreciate the things I had in general.

"Cancer was probably the best thing that ever happened to me, other than my children and husband. I met so many amazing people and it enriched my life."