It is said that Judy's version of "Who Cares?" was Marilyn's favorite song, and that she often played it at high volume.

Fitzgerald had an influence on Monroe as well. Monroe’s singing had a tendency to be overshadowed by dress-lifting gusts of wind and the flirtatious “Happy Birthday, Mr. President,” not to mentions her movies and marriage to Joe DiMaggio. But years prior to the Mocambo phone call, Monroe was studying the recordings of Fitzgerald. In fact, it was rumored that a vocal coach of Monroe instructed her to purchase Fitzgerald’s recordings of Gershwin music, and listen to it 100 times in a row.