On April 11, Anna took to Twitter to share this pic of her new blonde hair. "Debuting my new hair color in B&W in case any of my followers are colorblind. Or dogs," the Pitch Perfect star captioned the shot. Just two days before, she even teased her new 'do, "Had to dye my hair for a film. Keep getting spooked when I pass reflective surfaces. Now I know how puppies feel."