LOS ANGELES, April 23 (UPI) --
Glen Campbell has canceled the remaining dates on his North American concert tour because his Alzheimer's disease is worsening, Rolling Stone
However, Campbell, 77, is expected to release a new album called "See You There" in July.
He was diagnosed in December 2010 with Alzheimer's disease and had been performing a series of live farewell performances.
In addition to his music, Campbell is also famous for co-starring opposite John Wayne and Kim Darby in the original 1969 "True Grit" film.