I just heard from a reliable source, who got it from Jackie herself that this

Thursday, May 21, on Dave Letterman,
Jacqueline Schwab will be playing piano backup for Jean Redpath!

How cool is that? One song only - don't blink was part of the message, but this combination is worth wading through a show I haven't watched for decades, to see superb performers I haven't seen live for years. Perhaps some briliant soul will YouTube it for those who didn't find out in time!

Cheers!
Joanne in Cleveland