This 1973 Tribute to Irving Berlin is one of the most repeated episodes of the series, even in a case where perhaps 45 of the same LW episodes of the over 1000 are actually broadcast on PBS every year.
The song choice covers the enormous range of his opus, each one reduced to two minutes each in order to get the bloated number of cast members in. But still, with Berlin you can't really go wrong, even with Norma Zimmer's vibrato.
Guest for the 2006 wrap around was Cissy King. She was very magnanimous. No mention at all of how she was fired in 1978, nor her accusations as to the reason.