Hear the Studio version of Paul McCartney's Nirvana 'Reunion'

Marc Hogan/Spin

Call it Maccavana, Sirvana, or, as the Sun hilariously did when the London tabloid broke the news, then unconfirmed, "Paul McKurtney." Whatever the name for Paul McCartney's collaboration with Nirvana's surviving members — the former Beatle has called it a "Nirvana reunion," and, hell, it's one-fourth of a Beatles reunion! — it's definitively no joke. "Cut Me Some Slack," the song McCartney, Dave Grohl, Krist Novoselic, and Pat Smear premiered for the world during the 12-12-12 concert for Hurricane Sandy relief, is now available as a similarly sludgy studio version. The improved fidelity brings out some sonic similarities to Soundgarden's latest, though of course McCartney's gorgeous yowls (and the band's backing harmonies) put this on a whole different map. Call it post-grunge power-pop?

Whatever it is, McCartney and Grohl are having no trouble finding high-profile places to perform it. After first showcasing it at the charity event, the McCartney-led Nirvana incarnation also performed "Cut Me Some Slack" over the weekend on Saturday Night Live, where Sir Paul was the musical guest. An official video isn't online for whatever reason, but you can see a somewhat spammy-looking clip of their basically faithful performance below via the Audio Perv. McCartney also sang "Wonderful Christmastime," also not up on SNL's site, plus "My Valentine," from last year's Kisses on the Bottom.