As Gossip Girl’s Blair Waldorf, Leighton Meester is a bad-girl brunette. But as international ambassador for Herbal Essences, the actress/singer is playing a new role: dirty blonde. Meester, whose hair is naturally flaxen, dyes it for the hit CW series, but at a photo call to fête her new spokesperson deal in Madrid, she was looking decidedly less devious sporting a honey-colored side part and loose waves. What say you: better off dark and brooding, or is blonder the better course? Personally, I like her locks darker. That's the flair of Blair I've gotten used to.