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

John Legend performs at the Tiny Desk Concert on Wednesday, October 23, 2013. Abbey Oldham/Abbey Oldham/NPR hide caption

itoggle caption Abbey Oldham/Abbey Oldham/NPR