Bea grew up in the Los Angeles area, and began playing the piano at age 4 by listening to her seventeen-year-old sister, and by the age of seven she was also proficient at playing the accordion. At the age of thirteen, she talked her piano teacher into teaching her the basics of the organ. Nancy has been playing the organ at Bellflower Baptist Church for over 55 years; it was there that she met her husband, Bill. She also plays the organ at the Orange County Fair, the Pomona Fair, and has played shows in Las Vegas and Lake Tahoe.
In the mid-1980s, Bea filled in for a friend as the organist for California Angels games at Angel Stadium, and was offered a job which she declined not wishing to take work from a friend. When it was announced in 1987 that long-time Dodger organist Helen Dell was to retire at the end of the season after fifteen years, Bea auditioned at an exhibition game between the Dodgers and the USC Trojans on February 14, 1988. She does not plan her songs, getting her musical cues from the events occurring on the field during the game and including a variety of popular pop and rock songs alongside older and less commonly played numbers.