The Bewitched (1964) theme heard about halfway through this movie, complete with lyrics, sounds like Frank Sinatra, but it was actually a 1964 recording done by Steve Lawrence, who was known for his uncanny impersonation of Sinatra.
When Aunt Clara's (Carole Shelley's) bag drops from the chimney, a whole bunch of doorknobs fall out of it. This is a reference to the original series, in which Aunt Clara "collected" doorknobs.
Broomsticks were sent out to movie theaters as promotional items for this movie.
Kristin Chenoweth's part was written specifically for her, because Nicole Kidman very much enjoyed her performance as Glinda in the Broadway musical "Wicked."