The former Nirvana bassist loves politics and has become an election reform advocate
Brett Morgen says 'Montage of Heck: The Home Recordings' represents "another side of Kurt"
Album accompanys 2015 documentay made about Nirvana frontman
U2, Michael Jackson, Oasis and The Who also make list of top 50 songs
Cobain's take on 'And I Love Her' features in 'Montage of Heck' film
The footballer has previously uploaded videos of himself drumming to Foo Fighters, Coldplay and others
The bassist says Cobain 'wasn't thinking clearly' before his death
McEnroe performs alongside wife Patty Smyth
Track is believed to date back to 1993 or 1994
The alternate take is thought to date back to 1991