Glen Campbell: 5 Things You Didn't Know

Mindy Small/FilmMagic/Getty Images Glen Campbell has been diagnosed with Alzheimer's disease, he reveals in the new issue of People magazine. The Grammy winner, 75, and his wife, Kim, say they are sharing the news because he hopes to give a series of goodbye concerts this fall -- and they want fans to know his condition. PHOTOS: Grammys most memorable moments "Glen is still an awesome guitar player and singer," says Kim.