The low-maintenance highlights everyone will be asking for this summer.Credit: John Nacion/WWD via Getty ImagesEmma Stone might be known for her iconic copper hair color, but she’s actually a natural blonde. And like many actresses, she changes up her shade often for different roles. But her latest transformation—debuted at the Louis Vuitton 2027 Cruise Collection Show in New York—had me doing a double take.Full disclosure: I actually got wind o…