Sound City For everyone out there who was blown away by surviving Nirvana members Dave Grohl , Krist Novoselic and Pat Smear  jamming with Beatles icon Paul McCartney at the ’12-12-12′ Hurricane Sandy benefit show, we’ve got some good news for you! The song performed by the collective, ‘Cut Me Some Slack,’ is now available on iTunes. The incredibly raw track has a strong Nirvana vibe to it, while adding a splash of Sir Paul’s personality and heavier Beatles songs such as ‘Helter Skelter.’ The unlikely collaboration was recorded for Dave Grohl’s highly anticipated ‘Sound City’ documentary, which is set for a February 2013 premiere at the Sundance Film Festival. The flick will become available simultaneously through video-on-demand services as the Sundance projector starts to roll. At first, McCartney simply thought he was jamming with Grohl and some random musicians, unknowingly finding himself in the middle of a partial Nirvana reunion. “I didn’t really know who they were,” begins McCartney. “They are saying how good it is to be back together. I said, ‘Whoa? You guys haven’t played together for all that time?’ And somebody whispered to me, ‘That’s Nirvana. You’re Kurt.’ I couldn’t believe it.” Expectations were high when the public learned that an original song was composed by the group, but when McCartney, Grohl, Novoselic and Smear took the stage at ’12-12-12,’ the worldwide audience knew that they were witnessing something remarkable. The documentary’s soundtrack, ‘Sound City – Real to Reel,’ will see a March 12 release, but ‘Cut Me Some Slack’ is already available to purchase via iTunes . Go buy it! Listen to ‘Cut Me Some Slack’ [button href=”http://loudwire.com/paul-mccartney-nirvana-members-perform-new-song-cut-me-some-slack-12-12-12-concert/” title=”Next: A Recap of the 12-12-12 Performance” align=”center”]