'Bright Star' at the Ahmanson: Bluegrass, tears and a big, vacuous smile

As one theatergoer’s bliss is another theatergoer’s cornball, let’s accentuate the positive before delving into the negative of a show that reveals just how thin the line is between hokey and charming. “Bright Star,” the eager-to-please country musical by Steve Martin and Edie Brickell that had...