Bon Iver Collaborating with Alicia Keys

Bon Iver's Justin Vernon has announced plans to collaborate with Alicia Keys on a project he hopes will include many other female singers. "I have a big idea to do an American songbook of the greatest women singers. There are so many: Casey [Dienel] from White Hinterland, Bonnie Raitt, Alicia," he told USA Today. Vernon has already written songs with Keys, but so far it's unclear exactly how they will be recorded and released.

Vernon is set to perform with Bon Iver on Saturday Night Live this weekend and will appear at the Grammys the following week as a nominee for Best New Artist, Record and Song of the Year. The songwriter has already begun work on a new disc with his side project Volcano Choir, but warns his fans that he may not release a new Bon Iver album for several years. "I don't have songs written yet," he says. "I'm guessing three years. But it could be five. It could be only one more. It just depends when the songs come about. I sort of have to wait till they reveal themselves."