Khloe Kardashian isn't the only reality TV star with a major hair changeup this week -- check out Lauren Conrad's new 'do!

LC debuted a brunette mane at this week's CoverGirl 50th Anniversary party in Hollywood, with the former "Hills" star's stylist, Kristin Ess, telling "It was just time to go for it. We've done so many variations of blonde in the past and it's fun to do something new."

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