Model Christie Brinkley is being sued for $12 million by husband Billy Joel's former business manager, who says she got him fired because he drew up the couple's prenuptial agreement.

Frank Weber, the brother of Joel's ex-wife, was the singer's business manager from 1980 through August 1989. Weber claimed in court papers that Brinkley urged Joel to fire him because she "harbored ill feelings and malice" toward him over his work on the prenuptial agreement.Brinkley's lawyer, Alan R. Friedman, said the lawsuit was groundless and asked that it be dismissed.

Joel filed a $90 million lawsuit against Weber two years ago, claiming Weber stole and mismanaged his money. That case is pending.

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