Knowledge: Celebrities like Cardi B and Drake change the color of their hair often according to the music video requirements. However, Dakota Johnson has never changed her brown hair for any movie.

Conversation:
I have brown hair and i love other people with brown hair
Oh, that's nice. After black hair, brown is the second-most common color.
where is it most common?
I don't know where it is most common, but it is common in parts of Europe, the US, and parts of the Middle East.
oh thats good to know.  do people prefer long or short brown hair?
You know, I have no idea. I can say that the strands of brown hair are thicker than fair hair, but thinner than red hair.
Which celebrity has brown hair?

Response: Well, Dakota Johnson has never changed her brown hair for any movie.