Debuted during the '12-12-12' benefit concert in December, 'Cut Me Some Slack' emerged as one of the most discussed collaborations in years. But once the novelty of Nirvana's surviving members playing together again with the legendary Paul McCartney on vocals wore off, there was still one hell of a rock song.

The track, released as a single in January, starts off with some heavy distortion from Pat Smear and some bluesy slide riffs from McCartney's cigar box guitar. Add in McCartney's well-worn vocals and a furious drum finish from Dave Grohl on the track and this song just plain rocks.