Before Glen Campbell's song heads to the Oscars, it was a winner at the Grammys.

"I'm Not Gonna Miss You," from the documentary "Glen Campbell: I'll Be Me," won best country song at Sunday's show. It's nominated for best original song at the Academy Awards.

Campbell, who is battling Alzheimer's disease, didn't attend the Grammys.

"I am just so proud of him tonight ... he's been so courageous," his wife, Kim Campbell, said onstage. "Sadly, he can't be here with us because he's in the late stages."

She added: "Music I really believe kept him healthy."

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The Band Perry won best country duo/group performance for their cover of Campbell's "Gentle On My Mind," which appears on the documentary's soundtrack.