The Buika performs a Tiny Desk Concert in June 2013. Hayley Bartels/Hayley Bartels/NPR hide caption

itoggle caption Hayley Bartels/Hayley Bartels/NPR

Alpine performs at a Tiny Desk Concert in June 2013. Chloe Coleman/Chloe Coleman/NPR hide caption

itoggle caption Chloe Coleman/Chloe Coleman/NPR

Keaton Henson performs a Tiny Desk Concert on Friday, May 24, 2013 at NPR headquarters in Washington, D.C. Gabriella Demczuk/NPR hide caption

itoggle caption Gabriella Demczuk/NPR