Conversation so far:
When was the film Once released?
The film was first released on cinema in Ireland on 23 March 2007, followed by a limited release in the United States on 16 May 2007.
Where was the film Once released?
The film was first released on cinema in Ireland on 23 March 2007, followed by a limited release in the United States on 16 May 2007.
What is an interesting fact regarding the box office performance of the film Once?
After 2007's box office success and critical acclaim, it won the Independent Spirit Award for Best Foreign Film.
Did Once film win any other awards besides Independent Spirit Award for Best Foreign Film?
The song Falling Slowly won the 2007 Academy Award for Best Original Song.

Question: What is the song?
Self-contained rewrite: What is the song that won the 2007 Academy Award for Best Original Song?