Dave Grohl and Krist Novoselic Help Out Jimmy Fallon and Stevie NicksDave Grohl and Krist Novoselic Help Out Jimmy Fallon and Stevie NicksSoon-to-be Rock and Roll Hall of Fame inductees Dave Grohl and Krist Novoselic helped Jimmy Fallon introduce his latest music tribute on 'The Tonight Show' last night.Michael GallucciMichael Gallucci