'Gentle On My Mind,' released in 1967 on Capitol Records, was Campbell's breakthrough album.
It was the first to go to No. 1 on the country music charts and reach the platinum sales mark of one million albums sold.
At its heart was the single, "Gentle on My Mind," a cover of John Hartford's original that so enchanted Campbell, he called in some of his buddies from his legendary studio band, The Wrecking Crew, and recorded it himself to submit to his producer Al De Lory.
His first major hit, the song earned him his first two Grammy Awards and made the Arkansas native a rising star.