Mezzo-soprano Highlights Lesser-Known Pieces American mezzo-soprano Lorraine Hunt Lieberson has taken an unconventional career path. She's not singing the big roles at the Metropolitan Opera that are every soprano's dream. Nor is she preparing a crossover album of classic pop tunes. Instead, Hunt Lieberson finds drama within lesser known pieces. Her recent recording of Bach cantatas was named one of the ten best classical albums of the year by the New York Times and is currently No. 3 on the Billboard classical chart. Jeff Lunden has this profile.