Negotiating the Meaning of Music in Film

I think that the song First Day of My Life by Bright Eyes thoroughly develops the feelings of happiness, nostalgia and romance. It has a happy upbeat tempo, and is written in a major key, so that alone creates a happy atmosphere around the song. The lyrics describe the writer's deeply romantic and loving feeling toward a third party, and they also mention past events, that are happy memories for the couple, which brings in the feeling of nostalgia. I think that this song would be perfect for a quirky love story film, like Juno for example.