She's not a real girl - she's a robot.
Magician and artist Pierre Mayer created an automata based on Valerie, an actual quick change artist.
Valerie Automata by Pierre Mayer
The secret of Valerie
A quick change dress in real life
- Pierre Mayer Magic>>
- Valerie by Pierre Mayer, Cabaret Mechanical Theatre>>
Found thanks to The Automata Blog>>