Country star Glen Campbell (left, in 2006) died on August 8, in Nashville, after a six-year battle with Alzheimer's disease. He was 81. Details of the Rhinestone Cowboy singer's will were released Wednesday, and show that three of his eight kids have been excluded. Kelli Campbell, 56 (top, center left); Travis Campbell, 51 (top, left); and Kane Campbell (top, center right), 43; are not to receive any portion of his estate or resulting trust, according to the document. All three are from his second marriage to Billie Jean Nunley, which ended in 1976. Travis and his older half-sister Debby Campbell-Cloyd (bottom, right) sued for the right to visit their father in 2015 - winning the court battle a year later. They claimed that their father's fourth wife, Kim, had banned them from seeing him for over a year, when she put in a care home due to his Alzheimer's. At stake in Campbell's will is an estimated $50million estate. A hearing has been scheduled for January to address the contested will. Campbell had five other children from three marriages including Debby Campbell-Cloyd (bottom, right); Dillon Campbell (top, right); Cal Campbell (bottom, left); Shannon Campbell (bottom, center right); and Ashley Campbell (bottom, center left).