Tiny Desk Concert with Nickel Creek on August 13, 2014. Sarah Tilotta/NPR hide caption

itoggle caption Sarah Tilotta/NPR

Chris Thile and Sara Watkins of Nickel Creek perform at the 2014 Newport Folk Festival. Adam Kissick for NPR hide caption

itoggle caption Adam Kissick for NPR

Hawk House may be the face of hip-hop's evolution, and we're all the better for it. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Sara and Sean Watkins perform a live set on Folk Alley. Joe Gunderman hide caption

itoggle caption Joe Gunderman
courtesy of the artist