"He was a wonderful session musician as well - a lot of people don't know realise that but he could play anything and he could play it really well - so he was just extremely talented".
In 1967, he was awarded a record-breaking four Grammy Awards for "Gentle On My Mind" and "By The Time I get To Phoenix".
Glen Campbell's country legend status was solidified in the 70s, when he recorded a number of chart-topping singles, including "Southern Nights" and "Rhinestone Cowboy". Webb also wrote "Galveston" and the iconic "Wichita Lineman".
He is being remembered for his talent as a singer, songwriter, TV host, and actor.
The crossover artist explained in a slightly longer video posted that he was playing the next song "with more love than precision ... whether I play it right or wrong, I'd rather have played it".
His more than 70 albums sold more than 50 million copies, earning six Grammy Awards, including a Lifetime Achievement Award, and membership in the Country Music Hall Of Fame and Musicians Hall Of Fame.
Campbell died at the age of 81 after a long battle with Alzheimer's. We lost a friend this morning, and the world lost an enormously talented person in Glen Campbell. His output from these years skewed heavily toward Christmas albums, gospel records and best-of compilations.
MARTIN: Webb reflected on hearing his songs come alive through Campbell.
"Studies would suggest that people age 80 years and older, about 30 percent have dementia of the Alzheimer's type, and I think it gives us the opportunity to talk about the disease", Dr. Wright said. Although his final album, "Adios", was created in 2012-13, it wasn't released until April 2017.
His farewell tour and the accompanying film elicited an emotional outpouring. Campbell continued to make music, tour, and appear in movies and on television in the decades that followed.
Yet even as Campbell's disease progressed, he retained a deep musical fluency.