Barbie - Princess to Mermaid Fashion Transformation Doll? This Barbie Dreamtopia doll features a fantastical fashion transformation for twice the storytelling fun! With a skirt that transforms into a sparkling mermaid tail, Barbie doll can go from princess to undersea royalty in seconds. Simply remove her princess skirt, reverse it to reveal a rainbow mermaid tail with sparkling details, and fasten it back in place to transform her look! Barbie doll comes with an additional skirt for even more fashion fun,