Sing along with Barbie, Barbie, Teresa, and Renee in this musical adventure as they plan the biggest surprise birthday party ever for Barbie's sister, Chelsea. "Bigger than JUST a birthday, we have to plan a DREAMDAY!" The girls work together with the new and improved "magical DreamHouse" to fulfill their plan - in this DreamHouse, if you believe it, it can happen! But when the party gets TOO BIG, the magical DreamHouse can't keep up and creates a big mess! Can Barbie and her friends clean up the mess and pull together the perfect Dreamday before her sister gets home? Watch and find out in this first-ever My First Barbie special!