What is the violin solo played by Jessica Alba at end of called?

Jessica Alba is an actress, not a violinist. It's possible you're thinking of a scene in a movie or TV show where a character played by Jessica Alba is shown playing the violin.

To help me find the specific scene you're thinking of, please tell me:

* What movie or TV show is it?

* What is the scene about?

With more context, I can help you find the piece of music being played.