Peaking at number one in Canada, the USA and Ireland, Rhinestone Cowboy is Campbell's best-known song.
Glen Campbell, the multiple Grammy-winning country-pop singer, guitarist and TV personality whose half-century career was capped by a singular last act after he went public with his advancing Alzheimer's disease, has died.
Mayer and his band had played many songs before he brought up Campbell's death. Rejecting the shame and secrecy that sometimes attend Alzheimer's, Campbell turned into an advocate for the disease and was staunchly public about his affliction; audiences cheered him even as he struggled to remember his lyrics on stage.
Campbell started his career as a Wrecking Crew member, those highly-gifted session musicians that worked with the likes of the Beach Boys (Campbell played on Pet Sounds), Elvis Presley, Nancy Sinatra, and Merle Haggard.
The news of 81-year-old Glen Campbell's death from Alzheimer's Disease saddened many people, not least those who had seen him in concert at venues including casinos across the United States.
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Naming horses can be a hard process, but Campbell's famous words helped owners, particularly Coolmore's John Magnier, find fitting names for some of their stars. We lost a friend this morning, and the world lost an enormously talented person in Glen Campbell.
In this July 27, 2011 photo, musician Glen Campbell poses for a portrait in Malibu, Calif.
Campbell left home at the age of 14, performing on radio and television in Albuquerque, New Mexico, before landing in Los Angeles in 1960. He recorded songs for everyone from the Byrds to Elvis Presley to Frank Sinatra, but with the Beach Boys, Campbell almost had a full-time gig.
Campbell is famous for his county music and was inducted into the Country Music Hall of Fame in 2005.
He won another two Grammy Awards in 1968 for the best album By The Time I Get To Phoenix and best record Wichita Lineman.
Campbell was twice nominated for an Oscar, for "True Grit" and again 45 years later for "I'm Not Gonna Miss You", an original song from the documentary "Glen Campbell".