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Jessica Simpson’s sunny blond color always looks rich and healthy, thanks to her longtime colorist, Rita Hazan of The Rita Hazan Salon in New York City. We caught up with Hazan, shown inset, who counts Simpson as a close friend as well as a client, for the inside scoop behind the mom-to-be’s signature golden locks. Find out the star’s hair color secrets in the gallery!

MORE: Try on Jessica Simpson’s Hairstyle!