Music star Glen Campbell has revealed that he has been diagnosed with Alzheimer's and he will put out his final album this summer.

His is known for hits including Rhinestone Cowboy and Wichita Lineman.

Glen’s wife Kim told People that they want fans to know the reason if her husband forgets a lyric or gets confused on stage.

Glen is still an awesome guitar player and singer. 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 Kim.

Here are some photographs of Glen Campbell:

Music Star Glen Campbell
Recording artist Glen Campbell is photographed at his home in Malibu, California on August 4, 2008. Campbell will perform a rare club gig in Los Angeles on Aug. 19, the day his new CD of rock 'n' roll covers hits stores, his label said on August 6, 2008. REUTERS
Music Star Glen Campbell
Willie Nelson (L) and Glen Campbell perform on stage at the 20th Autry National Center gala at the Gene Autry Western Heritage museum in Los Angeles September 29, 2007. The gala celebrates the 100th birthday of late actor Gene Autry. REUTERS
Music Star Glen Campbell
Country music singer Glen Campbell was arrested Monday on suspicion of extreme drunken driving and hit and run after he crashed into another vehicle in central Phoenix, city police said. Campbell, whose storied career has included 27 Top 10 hits, also was booked into jail on suspicion of aggravated assault on a police officer for allegedly kneeing a sergeant in the thigh while at the station, said Sgt. Randy Force, a Phoenix police spokesman. Country artist Jo Dee Messina (L) looks at country singer Glen Campbell as they present at the 31st annual American Music Awards at the Shrine Auditorium in Los Angeles, California on November 16, 2003. REUTERS
Music Star Glen Campbell
Recording artist Glen Campbell is photographed at his home in Malibu, California on August 4, 2008. Campbell will perform a rare club gig in Los Angeles on Aug. 19, the day his new CD of rock 'n' roll covers hits stores, his label said on August 6, 2008. REUTERS
Music Star Glen Campbell
Glen Campbell and his wife arrive at the 31st annual American Music Awards in Los Angeles, November 16, 2003. REUTERS