Roc Nation

Fans of "FourFiveSeconds"—or anyone who got even mildly exposed to the RihannaKanye West and Paul McCartney collaboration in early 2015—have definitely wondered at one point or another who that little goblin voice in the background is. More than a few Beatlemaniacs were also curious how McCartney could seriously only play guitar on such a talent-summit.

Now both mysteries have been solved. "That's me," Sir Paul says of the chirpy, distorted voice in a new BBC interview, laughing. Asked if he was happy about his anonymous vocal, Sir Paul answered, "No, I loved it, are you kidding? What's wrong with that?" 

Detectives at the Kanye To The forum had previously done some pitch-shifting in the past and landed on McCartney as the culprit, but now we know for sure, and "FourFiveSeconds" will never be the same.

Macca also admitted that Yeezy inspires him, saying he's "a monster, you know, he's a crazy guy that comes up with great stuff." He went on to the live interview audience how a Picasso painting inspired him, long ago, to write the melody that became another early Kanye '15 single, "All Day":

“I get this track back, and it's like"—[hilarious fist-pumping imitation of "All Day"]—"he’s taken my melody and he’s made it like, seriously urban. ... The lyrics are like, y'know, there's the N-word a lot. ‘How long have you been at the mall?’ ‘All day, N-word!'"

McCartney said "quite a few people said you can't be connected with this, there’s like 40 N-words!" Oprah was one such party:

“She says, ‘You shouldn’t do it, even black people shouldn’t use that word.' I said, ‘Yeah, but it’s Kanye!' And he’s talking about an urban generation that uses that word in a completely different way. It’s the context. So I was actually pleased with it.”

Check out Fuse's archival interview with Kanye: