X Factor judge Sharon Osbourne is apparently furious at her son, Jack, because he has had every inch of his back covered by a tattoo.

Jack, who is currently in Los Angeles, is following in the footsteps of his father, Ozzy, who also has several tattoos.

A source told The People, "Sharon was seething. She hit the roof when she spoke to Jack over the phone. Ozzy is also mad at him.

"Jack had the massive tattoo outlined on his flesh in September and Sharon begged him not to continue with it. Now she feels he has betrayed her at a bad time.

"She was already very upset about the robbery, and now this."