Glen Campbell is a very famous American country music singer, guitarist, television host and occasional actor. He is best known for a series of hits in the 1960s and 1970s. In June 2011 Campbell was diagnosed with Alzheimer's disease. As the disease begins to worsen, Campbell begins to remember less and less. Campbell made the song "I'm Not Gonna Miss You" that gives a sobering representation of how he is feeling about this disease.