Since expatriating from Belle & Sebastian, where she sang and played cello, Isobel Campbell has flirted with twee on her solo disc Amorino and with indie chamber pop as the front woman of the Gentle Waves. On her latest, Ballad of the Broken Seas (V2), she collaborates with man of many bands Mark Lanegan, whose knowing growl acts as ballast to keep her gauzy, nuanced baby voice from floating off into the sky. Ethereal cowboy-country songs like "The False Husband" and "Honey Child What Can I Do?" recall Lee Hazlewood and Nancy Sinatra's records of yore, but without the bizarro carnal innuendo--Campbell sounds perfectly collected and totally serious when she sings of her elusive lover as a "butterfly" over flourishes of harp and happy guitar plucking. Matthew Kerstein opens. Sun 3/5, 8 PM, Schubas, 3159 N. Southport, 773-525-2508, $12 in advance, $14 at the door.