R..
I know it's not the one you are looking for, but have you seen August Rush? Best Movie EVER! It's about a boy who was separated from his mother at birth. He is a musical prodigy, trying to find her through his music. His mother finds out he is alive (she was told he was stillborn) and she is searching for him too... while his dad is searching for his mom. (they were separated before they knew she was prego.) It's got a lot of great music (and I don't generally like movies with a lot of music) and it's an awesome story. :)