Not to worry, Lauren Conrad lovers. It's just a wig.
But the California blonde nevertheless gave up her signature hairstyle for a long brown bob – albeit only for one day while posing for a magazine.
"I got to wear a brown wig all day," LC Tweeted.
"It [was] fun though ... Kinda like playing dress up."
What do you think? Does Lauren Conrad look better when she wigs out - or with the traditional, blonde locks we've come to love over the last three years?
Do you like Lauren Conrad's brunette look?