DING, DING DING....WE HAVE A WINNER!
next clue was going to be...
"You think just because you made a little money you can get a new hairdo and some expensive clothes and turn yourself into a lady. But you can't. Because you'll never be anything but a common frump whose father lived over a grocery store and whose mother took in washing."
yes Mildred Pierce, Kay sings it when she is dressing up, with Veda playing the piano
It is ridiculous to set a detective story in New York City. New York City is itself a detective story...
AGATHA CHRISTIE, Life magazine, May 14, 1956