STAR TRENDS

Stereo Types

DUO-DENIM: Power couple Brad Pitt and Jennifer Aniston are feeling the blues as they take a stroll in New York City. To see more Star Trends visit PEOPLE.COM

(PEOPLE) -- The U.S. Open is in full swing, but a different match game is being played in Hollywood as celebs like Brad Pitt and Jennifer Aniston pair up in corresponding casual gear.

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"It seems to happen accidentally," says L.A. stylist Jeanne Yang, "but when it does it's adorable."

It doesn't play as well after dark, though.

"Unless it's a costume party," says Yang, "it's something you should avoid."

with Amy Baumgartner in Los Angeles