I was wondering what woman was the guest singer on the last episode of I Love Lucy?
I heard the song she sang when I was watching Lucy's Biography on A&E, and I wondering what song it was, and who sang it?

Edie Adams sang a song on the last episode of the Lucy-Desi Comedy Hour. I saw this on the Finding Lucy special on PBS. It was right before there divorce.

What made this last episode particularly sad was the fact that Lucy and Desi weren't speaking to each other. They communicated through other people, which made it difficult on cast members and their two guest stars, Ernie Kovacs and Edie Adams.

If you watch that last episode, notice that they barely had any lines together and were never in a scene alone. That very last scene was teary for them because it was the last time they would act together, the last time that they would appear as a married couple. Very sad.

The song is called "That's All." Kind of ironic considering the circumstances.