The pristine Posada, Gaby Moreno’s first holiday outing, is a ravishing affair, delicately laden with lustrous acoustic instrumentation, soulful Mesoamerican rhythms, and Moreno’s haunting vibrato. The songs are traditional (in Spanish, English, Church Latin, and even German), but Moreno keeps the music feeling current with folkloric guitar and cumbia. For every reverent carol of English origin, an animated Latin counterpart brings the joy, whether it’s the rousing “Hacia Belén Va una Burra Rin Rin” or her alluring take on “Peces en el Río.”