Bing Crosby - The Hollywood Palace (1968)
The Hollywood Palace was an hour long variety show on ABC TV. There were many guests hosts (much like SNL) but Bing Crosby made the most appearances - 31 in all including starring on the Christmas specials. The show ran from 1964 thru 1970, with Bing hosting the final show.
Here's Bing singing his perennial hit on The Hollywood Palace Christmas show from 1968.