A Perfect Star Repeating Its Path

Young Christine Dae lives an interesting life with her two siblings Sebastian Dae and Caroline Dae.
Christine and her sorta twin sister Caroline are Sophomores in High-School and Sebastian, her older brother, is a Senior.
Caroline is a cheerleader and Sebastian is a football player.
Christine isn't a cheerleader or anything like that. She keeps more to herself. Christine wasn't ever a very 'normal' girl.
In fact Christine doesn't even know something about herself. She is actually the reincarnation of the 18 year old, 1870 Soprano of the Season, Christine Daaé.
She has also been keeping a secret,
Christine has been having dreams/nightmares and flashes of odd memories she doesn't remember having.
But Christine isn't the only one. A boy