Uh-oh, looks like there's trouble a-brewin' in celebrity fashion-line land.

Star Magazine reports that 22-year-old former O.C. actress Mischa Barton is livid over Nicole Richie's plans to launch a collection of headbands, much like Barton did in September with her Mischa Barton for Stacey Lapidus line.

Word is that that Richie, 27, is expanding her House of Harlow 1960 fashion line to include decorative. Decorative means headbands, and Barton is none too pleased.

"Mischa is furious," an insider tells the magazine. "She feels like Nicole completely copied the idea."

Ladies, ladies, ladies; please, set aside the bickering.

You're both young, talented and attractive. You both have a charitable streak a mile wide. And you both rock headbands pretty fiercely. (Though, in truth, you're not exactly the first celebrities to ever sport the look.)

Can't you kiss and make up, and combine your formidable headband talents? You could be more unstoppable than the Super Friends, King Kong and Count Chocula combined.

]]> en-us