Need a good cry? Proceed directly to "Back When We Were Beautiful." Geez. That spare, wistful, devastating ballad highlights the gentle mastery and easy chemistry of these critic-beloved all-timers, softly bleeding into every classic-country note here. Expert musical touches -- fiddle, pedal steel, accordion, roadhouse piano and such -- insure that even a winking tune like "Open Season on My Heart" never devolves into cornpone self-parody; fans of recent Americana-duet smashes like Raising Sand and Living for a Song will flip. And seriously: "Back When We Were Beautiful." Geez.