Okay so i have a question about some music from the movie new moon!?

[MarinaSanchez]

So like two weeks after New Moon the movie came out in theatres i went to go see it after i saw it i went home to look up the music that was in it. And i found a few songs writeen by a girl on youtube that were really cute and i loved them, but they werent in the song. I forgot who it was tthat wrote it. I remeber in one of the videos witht hte song, it was just a picture of the part that edward is saying goodbye to bella and it was just that picture for the whole thing. And yet it played a song. If someone can tell me who wrote it that would be wonderful. Her name started with a C i think and she was singign with a guy on some parts or he came in on some parts. But yeah thanks.