Glen Campbell

Glen Campbell is living with Alzheimer's disease, he has revealed in an interview with People magazine.

Though Campbell was diagnosed six months ago, the 75-year-old "Rhinestone Cowboy" singer, who hosted The Glen Campbell Goodtime Hour on CBS from 1969 to '72,  is just going public now in advance of his upcoming farewell tour.

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"Glen is still an awesome guitar player and singer," explains wife Kim, who was also interviewed by the mag. "But if he flubs a lyric or gets confused on stage, I wouldn't want people to think, 'What's the matter with him? Is he drunk?'"

Says Glen: "I still love making music and I still love performing for my fans. I'd like to thank them for sticking with me through thick and thin."