Model and actress Christie Brinkley is used to a lot of attention, but court documents show Uncle Sam has been watching her particularly closely. The IRS filed a lien against the ageless beauty for $531,000 in unpaid back taxes.

The reasons for the November 21 lien are unclear, but it was filed on her primary residence in Bridgehampton, Long Island. Her rep says she was “surprised,” but “has instructed her team to resolve the matter immediately.”

The 57-year-old Brinkley, who began modeling nearly four decades ago, made her Broadway debut earlier this year playing Roxie Hart in the musical ‘Chicago,’ reprising the role for a recent London production.

Even if it turns out she does owe the money, she probably won’t have trouble paying it. The former Mrs. Billy Joel and erstwhile Uptown Girl is reportedly worth some $80 million, mostly from various real estate holdings in the Hamptons.

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