Glen Campbell has canceled the remaining dates on his North American concert tour because his Alzheimer's disease is worsening, Rolling Stone reported.
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.
Get more Reality TV World! Follow us on Twitter, like us on Facebook or add our RSS feed.