In barbie in rock n royals two very different worlds collide when a mix up sends a princess and a rock star to the wrong camps as they face an epic sing off both girls embrace their differences find their true voices and learn that anything is possible when they work togetherr fans will love celebrating this musical story with erika doll who goes from rocker chic to princess pretty with ease simply push her arm to swing her guitar and her look will magically transform from a princess go