Simple as that. It's called "Once."
It's kind of a modern day musical about an Irish street busker and a Czech woman he meets that helps him take his music to the next level. It's really touching and beautifully filmed. And the music is fantastic. It stars Glen Hansard and a woman named Marketa Irglova. Glen is the lead singer and songwriter for the Irish band The Frames.
Highly recommended. Check out the trailer.
Here's a clip of one of the songs from the film. It's called "Falling Slowly."