In this clip from the 1946 film The Jolson Story, actor Larry Parks lip-synchs “April Showers” to the voice of Al Jolson (1886-1950). With music by Louis Silvers and lyrics by B. G. De Sylva, the song was introduced by Jolson in the 1921 Broadway musical Bombo, and became known as the showman’s trademark. (Source: wikipedia.org)