Barbie and the Diamond Castle (2008)

In "Barbie and the Diamond Castle" (2008), best friends Barbie and Teresa find themselves in an enchanted world where they discover the magical Diamond Castle. They must use courage and teamwork to stop the villain, Lydia, from turning the Diamond Castle into stone. With the help of new friends and the power of music, Barbie and Teresa embark on a journey of friendship and adventure to save the Diamond Castle and restore its magic.