London, March 6 - Christopher Ciccone has mocked his sister Madonna's new role as a marriage referee in an upcoming small screen series.

Ciccone, who left the Queen of Pop fuming with the publication of his tell-all book, openly disapproved the twice-divorced singer's involvement with the new American TV show The Marriage Ref.

"I can't imagine what she's doing on The Marriage Ref giving advice to married couples," the Daily Star quoted him as telling the New York Post.

He added: "I guess it's kind of ironic. Everyone has their experiences regarding marriage: hers are maybe what not to do." (ANI)