Barbie’s younger sister Chelsea is very excited—it’s her birthday tomorrow! The whole Roberts family are on holiday together and have a very special day planned for her. But when she wakes up the next day, the Roberts realise that it’s not Chelsea’s birthday anymore—they missed it! Chelsea travels to a nearby island to find a magical gem that grants wishes. With the help of some new friends, Chelsea is determined to track down the gem and get her lost birthday back! Based on the brand new special, Barbie and Chelsea The Lost Birthday, this storybook is perfect for younger fans of Barbie, who relate more to little sister Chelsea. After all ... who wants their birthday to be forgotten?!