"EASTER PARADE"

Easter Parade is a 1948 American musical film starring Judy Garland and Fred Astaire, featuring music by Irving Berlin, including some of Astaire and Garland's best-known songs, such as "Steppin' Out With My Baby" and "We're a Couple of Swells."

It was the most financially successful picture for both Garland and Astaire as well as the highest-grossing musical of the year.

More: http://en.wikipedia.org/wiki/Easter_Parade_(film)