Dessa performs at a Tiny Desk Concert on Sept. 24, 2013. Abbey Oldham/Abbey Oldham/NPR hide caption

itoggle caption Abbey Oldham/Abbey Oldham/NPR

Le1f performs at NPR Music's 2013 SXSW Showcase at Stubb's. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR