Jon Gold’s new single, "Lullaby for a Dream," is an act of gorgeous disorientation. You see the name—a pianist rooted in the intricate soils of jazz—and you prepare for one thing, but what arrives is a mist-laden skiff drifting from an entirely different shore. Gold, a Delaware musician, has composed a piece of British-Gaelic folk, and the cognitive dissonance is half the immediate magic....

Because of the deft manner in which she combines the styles of country music, pop music, folk music, and the music of her Brazilian ancestors, Anna Lopes stands out as a bright light in the huge musical tapestry of linked genres and worldwide influences that characterises the music business. At the age of 19, she uprooted her life and travelled to the United States to...