Her blithe melodies and minimalist arrangements don't conceal her abstract streak or alleviate the aridity of some of her conceptions, but Katie Herzig makes engaging, elusive pop music. A California native who grew up in Colorado before settling in Nashville four years ago, Herzig specializes in breathy electro-folk with the added attraction of strings, goofy synths and background vocals. Her 2006 full-length Weightless was aptly named —songs like “Jenny Lynn" and “Charlie Chaplin" acknowledged the tug of adulthood responsibilities while remaining unconvinced of their usefulness. Many of Herzig's songs have appeared in television shows, movies and commercials, and that's appropriate: They describe a middle-class background reality that often dispenses with specifics. When she hits it just right, as on “Hologram" and the insanely catchy “Hey Na Na," Herzig creates sublime '80s-style pop — arty bubblegum at its best.