I saw this episode. This was the first time I'd heard "Last Blues Song." Odd thing was, when the episode was over, I turned to "The Carol Burnett Show" and Valarie Harper ("The Mary Tyler Moore Show") guest starred singing the same song! So I heard the song twice in about a 30 minute period. Song's been stuck in my head ever since.
Both of these women made quite an impression on me when I was just starting to notice "vive la difference". I had no idea that they'd done a performance together until just now. Quite impressive, even more than three decades later.
I concur wholeheartedly. Julie did a great job as always, and her voice blended very well with that of Sandy, whom I consider to have been highly underrated as a singer.