Watch Bernie Sanders Sing With Vampire Weekend at Iowa Rally

Vermont senator joins rock group for "The Land Is Your Land" at Students for Bernie rally

Bernie Sanders joined Vampire Weekend and Dirty Projectors members onstage to sing "This Land Is Your Land" at Iowa City student rally

Iowa voters will hit the polls Monday as part of the crucial caucuses in the Hawkeye State, and at a Saturday night rally in Iowa City, Democratic hopeful Bernie Sanders was joined by members of Vampire Weekend and Dirty Projectors at the Students of Bernie rally. At the end of the night, the Vermont senator appeared onstage with the band to sing Woody Guthrie's "This Land Is Your Land."

Vampire Weekend were without Rostam Batmanglij, who announced this week that he was leaving the group, as well as bassist Chris Baio, currently touring with his Baio side project. To fill out their roster, singer Ezra Koenig and drummer Chris Tomsen recruited the Dirty Projectors' Dave Longstreth, the Hawkapellas, an all-female a cappella group from the University of Iowa and the comedy duo the Lucas Brothers.

Following an introduction from Dr. Cornel West, the makeshift group performed Vampire Weekend's "Cape Cod Kwassa Kwassa" and Modern Vampires of the City's "Unbelievers." "It feels a little fun to play a song called 'Unbelievers' when there's a big sign over there that says 'A future to believe in,'" Koenig told the crowd. "Maybe when this song was written, it came from a place of frustration or nihilism about the world, but we're so excited to be here and we feel the same way that you do about Bernie. He's somebody that we believe in."

Later, Koenig called Sanders an "once-in-a-lifetime candidate."