Glen Campbell Diagnosed With Alzheimer's Disease

June 23, 2011 American� country pop singer,� guitarist , television host and occasional actor, Glenn Campbell has been diagnosed with Alzheimer's Disease.� Glenn Campbell received the diagnosis six months ago and went public with it now because Campbell is scheduled to begin his farewell tour � in support of what he says will be his final album,� Ghost on the Canvas , due August 30 � and the Campbells want people to be aware of Glen's condition.