In which film does Doris Day sing the song 'Que sera sera'?

The song "Que Sera, Sera (Whatever Will Be, Will Be)", first published in 1956. It at once became a popular song which had been written by the songwriting team of Jay Livingston and Ray Evans. The song was introduced in the Alfred Hitchcock film "The Man Who Knew Too Much" (1956). This film starred Doris Day and James Stewart in the lead roles.

In the film, James Stewart and Doris Day are magnificent characters as Ben and Jo McKenna, an American couple vacationing in Morocco. Their son is kidnapped and taken to England. When they get caught up in international espionage, the McKennas' lives hang in the balance. They must race to save their son in a chilling, climactic showdown in London's famous Royal Albert Hall.

Like the meaning in the song "Que sera, sera", the McKennas' future is up in the air, and whatever is going to happen, is going to happen.