A major location was the Frank Sinatra estate in Chatsworth, California, where Lucille Ball and Desi Arnaz as well as Marilyn Monroe also once resided.
At the Frank Sinatra estate in the beautiful living room where the master performance was shot with three gorgeous background singers accompanying Holly, the rays of the sun illuminate the summer breezes gently blowing the translucent curtains. However, outside was another story. The worst rain storm in over 50 years was pounding the Los Angeles area. If you look hard enough, you can see rain streaming through the ceiling behind the background singers.
In the Bob Hope Patriotic Hall concert audience of 800, only 200 were real people while the rest of the audience were cardboard cut-outs.
This was the first film shoot in Los Angeles' brand new subway system.
The Sinatra estate location was the site of the legendary Life Magazine's nude photos of Marilyn Monroe in the estate's pool.