tv/ movies: Born Aug 6, 1911, She starred in this movie: The Whole Town's Talking - 1935?

Questions

Approximately how many waltzes did Johann Strauss Jr. compose ?

The song Tonight We Love was taken from the opening theme of which concerto ?

In 1970, 100 cellists played Sardana in tribute to what composer ?

Who wrote the Skater's Waltz ?

Domenico Scarlatti's works are often identified with "L" and a number. Whatdoes "L" stand for ?