Dear sondheimfan2,
I remember something like that, too. Do you remember Carol Burnett on the show singing "Ladies Who Lunch"? If so, then it was the first of three specials about the Broadway musical hosted by Sylvia Fine Kay (Danny Kaye's wife) that was on PBS ages ago (that I would kill to have a DVD of).
The format was that she presented numbers from the different eras of musicals: Pre-R&H, Rodgers and Hammerstein and the modern day. The Rodgers and Hammerstein show was Oklahoma! (Carol Burnett sang "I Cain't Say No") and the modern show was "Company" (besides Carol singing "Ladies Who Lunch", Bernadette and, I believe, Richard Chamberlain sang "Barcellona." "Good News" might have been the Pre-R&H show.
Yes, ladies and gentlemen, this is how I spent my childhood: watching specials about Broadway on PBS.
And my sister was surprised when I told her I was gay...
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba