Oksana Grigorieva to appear on 'Oprah'

Mel Gibson's ex Oksana Grigorieva is to appear on Oprah Winfrey's daytime chatshow.

According to Radar Online, the Russian singer will open up to Winfrey on a forthcoming episode of her show.

Oprah and 60 minutes were both reportedly vying to land the interview.

"Oksana has a very powerful story to tell, from emigrating to the United States from Russia, her marriage to Timothy Dalton, her music career and the volatile relationship with Mel Gibson," said a source.

When asked what she would be talking about during the interview, Grigorieva said: "The truth will come out."

Grigorieva has accused Gibson of extortion and domestic abuse during their child custody battle over their baby daughter.