Deranged killer Mark David Chapman gunned down John Lennon over a pathetic desire to “be a somebody,” he recently told a parole board, ahead of the shocking crime’s 45-year anniversary .

“This was for me and me alone, unfortunately, and it had everything to do with his popularity,” Chapman, 70, said from the Green Haven Correctional Facility in late August, according to an interview transcript obtained by The Post on Friday.

“My crime was completely selfish.” 4

Chapman, who assassinated the beloved 40-year-old Beatle outside the Dakota apartment building on Dec. 8, 1980, made his 14th unsuccessful attempt at getting sprung from prison. He apologized for causing “devastation” to fans and friends of the rock legend — but the board ultimately didn’t buy his sorrow, the records showe

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