Some of music's biggest names just paid tribute to John Lennon for what would have been his 75th birthday--here are the biggest highlights from Imagine: John Lennon 75th Birthday Concert.

Lennon's legacy continues to live on decades after his untimely death. He was honored in the new tribute concert Imagine: John Lennon 75th Birthday Concert, which aired Saturday on AMC. Many legends took the stage to sing some of Lennon's most iconic hits, while the special also featured special messages from Yoko Ono, Paul McCartney and Ringo Starr.

So did you miss the big concert? We're breaking down the biggest highlights from Imagine.

Willie Nelson performs "Imagine"

Nelson performed an understated, plaintive version of Lennon's iconic hit "Imagine," showing off his guitar skills and pleading about dreaming of the world being a better place.

Aloe Blacc sings "Watching the Wheels"

Blacc performed a stirring rendition of Lennon's touching ballad "Watching the Wheels." The singer gave the song a soulful spin that made the crowd give him a standing ovation.

Tom Morello performs "Power to the People"

Morello's electrifying performance of "Power to the People" had the crowd energized. The uplifting, inspirational protest song was performed with great fervor by Morello, who displayed his own impressive guitar skills.

"Happy Xmas (War Is Over)" Performance

Just in time for Christmas, Blacc, Sheryl Crow and Peter Frampton performed a touching rendition of "Happy Xmas (War Is Over)" along with the Stuttering Association for the Youth.

Birthday Card

Blacc, Morello, Frampton, Crow, Britt Daniel, Black Thought, Questlove, Kevin Bacon, John Fogerty, Brandon Flowers, Juanes, Steven Tyler, Pat Monahan, Kris Kristofferson and Chris Stapleton all wished Lennon a happy birthday in a touching video birthday card message.

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Television, Music, AMC