Watch Tim McGraw Sing "I'm Not Gonna Miss You" at the Oscars

Tim McGraw was on hand at the Oscars to sing the nominated song "I'm Not Gonna Miss You" by Glen Campbell, from the documentary Glen Campbell: I'll Be Me, and the backstory of the song is truly heartbreaking. Country star Campbell wrote the song for his family when he was diagnosed with Alzheimer's, making the title of the song and its lyrics a real tearjerker. Watch the performance again and try to hold it together.