His music — and murder — echoes through the generations.

John Lennon fans gathered in Central Park Monday on the 45th anniversary of his murder — with mourners including Gen Zers born well after The Beatles legend was gunned down.

“John’s the best. He’s my idol. He’s my everything and I love him so much,” 19-year-old Niko Karchava said at Strawberry Fields, the memorial section of the park dedicated to the singer-guitarist on the Upper West Side.

“And my children will love him, my grandchildren will love him and everyone will love the Beatles, forever.”

The young man traveled from Georgia to be among the roughly 80 people to gather at the park.

About 14 musicians popped in at different times to play songs in the freezing cold in a tribute to Lennon, who was shot and killed outside the

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