Singer recorded acoustic version of Nirvana classic at home on four-track recorder in 1988
Singer-songwriter-winemaker talks avoiding "kiss-and-tell crap" in upcoming authorized biography
Singer-songwriter surveys political scene, dishes on band's future plans at Farm Aid 30
Global Festival curator Chris Martin also appears during Ed Sheeran's set to sing "Thinking Out Loud"
Guitar virtuoso shares video for 'The Story of Sonny Boy Slim' opener
John Roecker film chronicles making of band's 2004 rock opera featuring rare concert footage
Singer's collaborative LP with Flaming Lips titled 'Miley Cyrus & Her Dead Petz'