[gallery] MGMT performs a free Live on Letterman webcast on May 11! Preview MGMT's brand-new album, Congratulations, on the band's Web site, then purchase it via iTunes or your favorite record store. Listen to more MGMT--plus music from friends and associates--on this special [listenlive id="38230"]MGMT station[/listenlive]. And watch clips from CBS Interactive's exclusive interview with MGMT!

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