Tim McGraw channeled the voice of country music icon Glen Campbell during the Oscars on Sunday to perform Best Original Song nominee “I’m Not Gonna Miss You.”

Campbell, who suffers from Alzheimer’s Disease, wrote the song during the production of James Keach’s documentary “Glen Campbell: I’ll Be Me.”

Also Read: Oscars Winners and Nominees: The Complete List (Updating Live)

The 78-year-old, currently living in an assisted-living facility specializing in Alzheimer’s care in Tennessee, is no longer able to perform. The song, co-written by Julian Raymond, was Campbell’s final recording and is a poignant farewell in which the singer tells his wife that she’s the last person he’ll ever love, although he won’t remember her.

“I’m Not Gonna Miss You” is one of five Best Original Song nominees that were performed throughout the show. Others include “Everything Is Awesome” from “The Lego Movie,” “Glory” from “Selma,” “Grateful” from “Beyond the Lights” and “Lost Stars” from “Begin Again.”

Watch McGraw’s cover and then listen to the original, below:

Oscars Red Carpet Arrivals (Photos)

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Jennifer Lopez ("Boy Next Door")
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Meryl Streep ("Into the Woods")
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Lady Gaga and Keira Knightley ("The Imitation Game")
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Jared Leto ("Dallas Buyers Club")
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Justin Theroux ("The Leftovers") and Jennifer Aniston ("Cake")
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Scarlett Johansson ("The Avengers")
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Nicole Kidman ("Paddington")
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Benedict Cumberbatch ("The Imitation Game") with wife Sophie Hunter
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Jennifer Hudson
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Kerry Washington ("Scandal")
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Jessica Chastain ("A Most Dangerous Year")
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Director Ava DuVernay ("Selma")
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Lupita Nyong'o ("12 Years a Slave")
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Reese Witherspoon ("Wild")
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Viola Davis ("How to Get Away with Murder")
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Supermodel Chrissy Teigen
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Jennifer Aniston ("Cake") and Emma Stone ("Birdman")
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Ellar Coltrane
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Rita Ora ("Fifty Shades of Grey")
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Chloe Grace Moretz ("Kick-Ass")
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Cate Blanchett ("The Hobbit: Battle of the Five Armies")
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Bradley Cooper ("American Sniper")
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Zoe Saldana ("Guardians of the Galaxy")
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Sienna Miller ("American Sniper")
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Naomi Watts ("Birdman")
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Rosamund Pike ("Gone Girl")
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Recording artist Adam Levine with model Behati Prinsloo
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Julianne Moore ("Still Alice")
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Marion Cotillard ("Two Days, One Night")
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David Oyelowo ("Selma") and Michael Keaton ("Birdman")
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Steve Carell ("Foxcatcher") with wife Nancy Carell
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Melanie Griffith with daughter Dakota Johnson ("Fifty Shades of Grey")
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Laura Dern ("Wild")
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Margot Robbie ("Focus")
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Joanna Newsom ("Inherent Vice") and Andy Samberg ("Brooklyn Nine-Nine")
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J.K. Simmons ("Whiplash")
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Carmen Ejogo ("Selma")
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Oscars host Neil Patrick Harris with husband David Burtka
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Recording artists Faith Hill, in J. Mendel, and Tim McGraw
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Patricia Arquette ("Boyhood") wears wears Rosetta Getty, with sister Rosanna Arquette
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Richard Linklater and Ethan Hawke ("Boyhood")
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Actor and recording artist Common ("Selma")
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Recording artists Tegan Quin and Sara Quin ("Everything Is Awesome" from "The Lego Movie")
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Model Karolina Kurkova rocks Marchesa
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Anna Kendrick ("The Last 5 Years") in Thakoon
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Josh Hutcherson ("The Hunger Games")
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Gina Rodriguez ("Jane the Virgin")
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Jamie Chung in Yanina Couture
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America Ferrera in Jenny Packham
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Celebrity chef Wolfgang Puck
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Kelly Preston and John Travolta
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Ryan Seacrest
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TV personalities Charissa Thompson and Mario Lopez
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Michael Strahan
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Set decorator Tatiana MacDonald ("The Imitation Game") and production designer Maria Djurkovic ("The Imitation Game")
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Michael Keaton with "Birdman" director Alejandro González Iñárritu
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"Good Morning America" TV personality Robin Roberts
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Composer Hans Zimmer ("Interstellar")
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Disney Channel star Zendaya
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Kevin Hart ("Get Hard")
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John Stamos ("Full House")
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Oscar statues outside the entrance of the Dolby Theatre
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Gwyneth Paltrow
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Oscar Performance: Tim McGraw Performs Glen Campbell’s ‘I’m Not Gonna Miss You’ During Oscars (Video)

Oscars Red Carpet Arrivals (Photos)

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