Begin the Beguine
What a fantastic number this was. And Eleanor Powell cannot only dance (as good as Fred imo) well, she's also, at 28, very beautiful.
One of the best parts about this number was the Black and White Cinematography. It rivals a 1941 film called "Sun Valley Serenade." I'm referring to Sonja Henie's marvelous ice-skating routine which ended the movie.