Rewrite: Barbie and her siblings star in: Barbie Princess of Gardania

AU. Barbie is trying to find a new movie to work on when her parents suddenly die. Alone, Barbie concentrates on taking care of her younger siblings...only for her paternal grandparents that she didn't know existed to insist that they all move in with them. Barbie isn't too sure that they know how to care for eight minors though. Is everything up to her still?