Brigitte Bardot from the 1963 film Contempt (Le mepris)
I'm definitely a fan of headbands -- it's amazing the number of options that are out there. I mostly prefer the classic and simple styles from the '50s and '60s, as worn by such icons as Brigitte Bardot, Audrey Hepburn and Catherine Deneuve. (Side note: The fact that two of the aforementioned ladies are both featured with adorable animals in the photos below is purely coincidental.)
In contrast, I also like headbands from the '20s and '30s, with the details and decadence.
Arcade Card Beauties
Time Machine to the Twenties