An adungu is the African harp she's playing in this song of the same name. I love Diego (Diaz's) eerie slide along with it. Percussionist Sandy Blocker and bassist Aaron Bond were also great, and Will Ridenour joined them to provide a little extra percussion.
From her flawless delivery of Malagueña Salerosa, you'd think Crystal was Spanish or Mexican. She has spent time in a mariachi band (Malagueña is a classic traditional Mexican song), as well as in Spain. The video weirds out a little at the beginning (thank my shaky hand and Youtube software's best effort at stabilizing it), but it clears up after the first 30-40 seconds.
I'll have to remember to post photos from this show later. Birdeatsbaby, from Brighton, UK, came all the way over the pond, and were a great opener for Crystal.