Brad Paisley turned to social media not only to remember Glen Campbell, but also to call for a cure for Alzheimer's "once and for all" in memory of the entertainment icon.

In an Instagram post Tuesday (Aug. 8), Paisley writes, "Alzheimer's is a thief. And although it may rob someone of their memories, it cannot touch their legacy. And what a legacy you leave behind Mr. Campbell." He shared a picture of himself jamming with Campbell onstage, extending his trademark cowboy hat in tribute to the singer and guitarist.

"Let's figure this disease out once and for all. In memory of Glen," he adds, ending with the hashtag #endalz.

Paisley's mother-in-law, Linda Wayne Williams, died after a long struggle with Alzheimer's and dementia in November of 2016. His wife, actress Kimberly Williams-Paisley, chronicled her mother's struggle in a book titled Where the Light Gets In. Paisley and Williams both participated in a disco-themed event in June of 2017 to raise awareness and funds to fight the disease, for which there is no known cure.

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Campbell died on Tuesday at the age of 81 after a long battle with Alzheimer's. At the end of his life he was living full-time in a Nashville care facility, and his daughter, Ashley, admitted that he was in such bad shape that he didn't even know that his final album, Adios, had been released in June.

"We don’t want to sugarcoat it," she told the Boot. "He has no idea that he has an album out. He had no idea when he won a Grammy."

Tributes have poured in from every corner of the entertainment world, with Keith Urban praising Campbell's musical influence and "humanity," while Jake Owen turned to Facebook Live to share his cover of "Wichita Lineman." John Mayer stunned the crowd at his Nashville gig on Tuesday night with a jaw-dropping cover of "Gentle on My Mind," calling it "my favorite song in the world."

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