Paul McCartney on the November 2013 Rolling Stone cover. Credit: Peggy Sirota

1969 was the year the music died, or, at least, the year The Beatles ended. The iconic British boy group disbanded in the late '60s, and many blamed John Lennon's wife Yoko Ono's influence. Beatles frontman Paul McCartney has publicly had a tense relationship with Ono, 80, but in the November cover story for Rolling Stone, McCartney, 71, ended the feud once and for all. 

Calling his former bandmate's wife a certified "badass," McCartney talked about his struggle with his feelings toward Ono. 

"I thought, 'If John loved her, there's got to be something. He's not stupid,'" McCartney told Rolling Stone. "It's like, what are you going to do? Are you going to hold a grudge you never really had?" 

And the "That Was Me" singer admits that another Beatle influenced his decision to forgive and forget when it came to Ono. 

"George [Harrison] would say to me, 'You don't want stuff like that hanging around in your life,'" McCartney revealed of his late bandmate. 

And though he's been able to put his bitter feelings toward Ono behind him, McCartney admits there's one person he'll never forgive -- Lennon's murderer, Mark David Chapman, who fatally shot the singer outside his New York apartment in 1980. 

"I think I could pretty much forgive anyone else," he continued. "But I don't see why I'd want to forgive him. This is a guy who did something so crazy and terminal. Why should I bless him with forgiveness?"

The legendary singer has just released his 24th post-Beatles album, New.