Dave Grohl asked his former Nirvana bandmate Krist Novoselic and Nevermind producer Butch Vig to help him out on the new "old school analogue" Foo Fighters album. NME reports Novoselic handles bass on one track. No Age collaborator Bob Mould appears on another. The Mould track's called "Dear Rosemary." Grohl spoke about his input, telling BBC Radio 1 that "['Dear ...