Sir Paul McCartney to Lead Nirvana Reunion at 12-12-12 Sandy Relief Concert
12/12/2012 AT 01:50 PM EST
Sir Paul McCartney will front a Nirvana reunion as part of Wednesday night's 12-12-12: The Concert for Sandy Relief, a source confirms to PEOPLE.
The performance comes 18 years after lead singer Kurt Cobain took his own life at just 27 in 1994.
The Sun reports that McCartney, 70, has been "secretly working" with the former band members, Foo Fighters singer Dave Grohl and bassist Krist Novoselic, following a recent session at a studio.
As for whether the trio will perform new music ...
"I won't say it's not true," is all another source will add. No word yet on the possibility of it being a Nirvana classics-heavy set.
But Novoselic gave fans a sneak peek of what the trio's music might be like when he Tweeted at Pope Benedict XVI – who recently joined Twitter – on Wednesday afternoon.
"It is a new song that's kind of Helter Skelter meets Scentless Apprentice. It rocks with a heavy groove. St. Paul is powerful. @Pontifex," he wrote.
Other performers include Billy Joel, Alicia Keys, Bon Jovi, Bruce Springsteen, Eddie Vedder, Roger Waters, Kanye West and The Who. The concert will be live-streamed on PEOPLE.com as well as 121212concert.org.
Whether you think it's a great idea or not, here's what fans have to say on social media about McCartney fronting a Nirvana reunion.