I am speculating, but this concert is from 1993 and I believe the Sondheim Carnegie Hall (where she sang "Back in Business", so you're close) was 1992. I know the Carnegia Hall event was not too long after her terribly mishandled film (by the studio) "Stepping Out" was released in 1991. I remember that period vividly. She was in top form on all fronts. This was the Radio City/"Results" period. She was basically on fire.
And I have never truly forgiven Paramount Pictures.