It's about being a kid, and having fun while you're still you. You're not '17 Forever". This song definately should have been in Twilight-it reflects the situation that Bella and Edward are in. It's kind of sad :(
But the song is pretty. Um. Awesome! I like the beat and I love Mason and Trace's voice! It's kind of mysterious. This song is on my myspace because it's the best: D