What's Behind Björk?

A certain Icelandic songstress is earning rave reviews for her new Volta and the live shows she's performed in support of it. We talk with New Yorker music critic Sasha Frere Jones about the role musical collaborators and the singer's high-profile played in the new CD. And, we find out from Rolling Stone senior editor David Fricke about bands from her native country that are following in her footsteps.