They will join Delta Rae and Campbell's daughter Ashley at Nashville's Music City Center in Tennessee on 19 October (14) to pay tribute to the Rhinestone Cowboy, who recently retired to concentrate on his battle with Alzheimer's disease .
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A screening of Glen Campbell... I'll Be Me will follow and tickets from the event will benefit Alzheimer's disease awareness.
The documentary will open in New York and Nashville on 24 October (14), followed by a national release to over 50 cities.