Rhinestone cowboy Glen Campbell doesn’t know his very last recording, “I’m Not Gonna Miss You,” won Best Country Song at the 2015 Grammy Awards. The 78-year-old, whose 70-plus albums have sold more than 45 million copies, has Alzheimer’s disease, a form of dementia. “I'm still here, but yet I'm gone ,” the lyric begins. Co-written by Campbell and producer Julian Raymond about the personal effects of the disease, and featuring famed session musicians The Wrecking Crew (of which Campbell was once a part), the song appears in the Oscar-nominated film, Glen Campbell…I’ll Be Me, which documented his 2012 “Goodbye Tour.” The song appears on the soundtrack, which comes out Feb. 17. Buy it here. — Karen Bliss