Book excerpt: Get ready to rock! In this upbeat story, Barbie stars as Princess Courtney, a modern princess who switches places with Erika, a famous rock star. A mix-up sends Princess Courtney to Camp Pop and Erika to Camp Royalty where the girls learn to adjust to the different worlds and have fun while making new, unexpected friends. When Courtney and Erika learn both camps are at risk of shutting down, they must embrace their differences, find their true voices, and work together to show anything is possible when you dare to dream big!