More than a few people were skeptical when it was announced that Sir Paul McCartney was to perform with Nirvana at Wednesday's 12-12-12 concert... they shouldn't have been.
The Beatle legend rejoined the '90s icons for a second jam on Saturday night's Saturday Night Live and was on better form than ever as he helmed the fledgling band's performance of Cut Me Some Slack, a delicious marriage of McCartney melody and Nirvana's hard, driven rock.
Kurt Cobain's widow Courtney Love whined, of course, but the idea that her late husband - a massive Beatles fan - would have objected to the union is ludicrous.
Scroll down to watch Sir Paul and Nirvana perform Cut Me Some Slack at 12-12-12...
A new legend: Krist Novoselic and Paul McCartney blew the roof off the Saturday Night Live studios on Saturday night
Backseat driver: Dave Grohl worked up a sweat as he drove the incredible performance along
What's more, the 70-year-old legend and Nirvana's Dave Grohl, Krist Novoselic and unofficial member, Pat Smear, have created something special and unique with the new blistering track.
Cut Me Some Slack is an apt title for the savvy McCartney, who was criticised for his under par performance of Hey Jude at the opening ceremony, as is the grungey change of direction.
He prepared the crowd at Sandy for it's searing tempo by reminding them that he could rock with (and before) the best of them by opening his set with the rip-roaring Helter Skelter from 1968's White Album.
Perfectionist: As usual, mercurial Paul has taken a different direction after being criricised for his Olympics performance... and it's paid off
Nifty: Sir Paul played up a storm on a cigar box guitar
Sight to behold: The Beatles and Nirvana united... Kurt and John would be proud
It was mercurial Paul who was the driving force behind the Beatles most eclectic long-player so it's unsurprising he decided to mix things up again after the backlash to his greatest thumbs aloft anthem.
And it's worked; strumming on his cigar box guitar in simple jeans and grey shirt - Macca raised the roof at the New York studios as Dave Grohl worked himself into a sweat with his merciless beat.
Despite Courtney's lack of enthusiasm for the collaboration, the McCartney fitted in to the grunge band with ease even on their first high profile outing.
On fire: McCartney's performance at the 12-12-12 concert was incredible and he seemed fired up to perform on the hit U.S. show
Red hot: Sir Paul also performed the ballad, My Valentine, a song he wrote for wife Nancy
Treat: The Beatle is truly back on song
Dave took his seat behind the drum set while Paul sang, the collaboration will be included on the soundtrack of Grohl's new film 'Sound City Movie.'
During an evening that included performances by Alicia Keys, Eric Clapton, The Rolling Stones and Kanye West, the duet stood out as a highlight, as the two musical powerhouses joined forces.
Joining forces: Sir Paul McCartney took Kurt Cobain's place in Nirvana as the band performed at the Sandy Relief Concert
Collaboration: McCartney and Nirvana drummer Dave Grohl performed a new track for the crowd
Different styles: Despite the different musical styles and generational gap, the performers fitted together with ease
McCartney recently admitted that it suddenly dawned on him that he was in the middle of a Nirvana reunion while 'jamming' with some people recently.
‘I didn't really know who they were. They are saying how good it is to be back together,' he told The Sun.
‘I said, “Whoa? You guys haven't played together for all that time?” And somebody whispered to me, “That's Nirvana. You're Kurt.”
Old Fey-vourite: Tina popped up during Martin Short's hilariously self-indulgent monologue
Martin and his Wiig: The pint-sized funnyman hammed it up with another old star Kristen