Throughout his legendary career, Glen Campbell topped the pop and country charts with a number of songs penned by Jimmy Webb. "By the Time I Get to Phoenix," "Wichita Lineman," "Galveston" and "Where's the Playground Susie" are just a few of the tunes written by the Oklahoma-born Webb that were popularized by Campbell through his albums, concerts and frequent TV appearances. Now, as the multi-award-winning entertainer winds down his Goodbye tour this year, a thrilling document of their frequent collaborations is about to be released on CD and DVD. The two-disc collection, In Session, on Fantasy Records is due Sept. 25.

Taped in 1983 in the Hamilton, Ontario studios of CHCH-TV, "In Session" was a Canadian concert TV series conceived as a way of pairing artists with deep mutual admiration. In addition to Webb and Campbell, the series paired such artists as B.B. King and Larry Carlton, Dr. John and Johnny Winter, and Albert King and Stevie Ray Vaughan.

With Webb at the piano and Campbell on guitar, the pair perform such iconic hits as "Wichita Lineman" and "Galveston," along with "MacArthur Park," "Still Within the Sound of My Voice" and "The Moon Is a Harsh Mistress." The performance also spotlights the only known recording of a Jimmy Webb tune titled "Sunshower," a song initially written and produced for R&B singer Thelma Houston.

The two musicians have remained close friends through the years, and while Campbell's 2011 revelation that he is battling Alzheimer's disease has brought forth support for the Country Music Hall of Famer from all over the world, the experience has affected Jimmy on a deeply personal level.

"What is happening with Glen, which is basically his long goodbye, is really one of the most painful things I've been through in my life," notes Webb. "There's no way it can compare to what has happened with the family, but in terms of someone outside the family, I would have to be the one who feels the most."

In addition to all the memorable songs performed, the collection includes excerpts from an interview with Jimmy Webb and captures the two longtime friends reminiscing with one another.

Watch Glen Campbell Reflect on His Career

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