Katherine Jackson, the mother of deceased singer Michael Jackson, has filed a petition for guardianship of his three children. The petition states that the children don't have a relationship with their biological mother. Katherine is currently taking care of the children and has a long established relationship with them. She has also filed to become the administrator of Michael's estate to make sure that his children are the beneficiaries. Her husband Joe Jackson has joined the petition to try to designate Katherine as the the keeper of Michael's estate.