Jimmy Durante closed his shows and appearances with this Catch Phrase and finally revealed it was a tribute to his first wife.
Quote from Wikipedia:
At a National Press Club meeting in 1966 (broadcast on NBC‘s Monitor program), Durante finally revealed that it was indeed a tribute to his wife. While driving across the country, they stopped in a small town called Calabash, whose name she had loved. “Mrs. Calabash” became his pet name for her, and he signed off his radio program with “Good night, Mrs. Calabash.” He added “wherever you are” after the first year.
Durante’s first wife was Jean “Jeanne” Olson, whom he married on June 19, 1921