Nina Diaz and Y La Bamba's Luz Elena Mendoza have never played together, but after NPR Music paired them in the courtyard of St. David's Episcopal Church for a late evening performance, we're beginning to wonder why not. They've both played the Tiny Desk (Diaz twice, once with Girl In A Coma) and both navigate complex emotions and notions of identity in their music. Also, they just sing beautifully together, Mendoza's yodel swirling in Diaz's gritty croon.