Bon Iver closed a number of their 2008 sets with Nashville-based singer/songwriter Sarah Siskind's "Lovin's for Fools," and Bon Iver's Justin Vernon likes the song so much that he was compelled to crash guitarist Bill Frisell's concert this past Saturday at the Cedar Cultural Center in Minneapolis, just so he could perform the song with Siskind and Frisell. Man's a stalker.