The singer's estate sued businessman Howard Mann, who operates the website www.jacksonsecretvault.com, on Thursday, claiming both are infringing on copyrights and pose unfair competition. The website features a book of Katherine Jackson's recollections of her son and released a remix of a Jackson song shortly before the release of a posthumous album last year.

The copyright infringement lawsuit asks a federal judge to turn over the website to the estate. It also seeks all profits from the website, which would go to the multimillion estate that supports Katherine Jackson and the singer's three children.

The complaint alleges Mann and the site are using Jackson's likeness improperly, including images from the film "This Is It» and five sketches the singer drew. The lawsuit states Mann has created a false endorsement by including a "special thanks» to the estate in Katherine Jackson's book despite not receiving permission for the use of copyrighted works.

Several of the Jackson Secret Vault releases have occurred at the same time as estate projects were being released, including the anniversary of Jackson's death and the release of the album "Michael» in December. That album sold more than three million copies.