Country singer who crossed into the mainstream in the 1970s Glen Campbell, announced today that his is suffering from Alzheimer's Disease.   Campbell hit the top of the charts with "Rhinestone Cowboy" and was the host of The Glen Campbell Goodtime Hour on CBS.

The couple have decided to go public with Glen’s diagnosis because he's hoping to say farewell with a final slate of live performances this fall – and they want his fans to be aware of the musician's condition.

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