Madonna’s former art consultant and friend Darlene Lutz is about to auction off several of the singer’s personal items, including a 1995 prison letter from Tupac that reveals he dumped her because she’s white and another letter in which she calls Whitney Houston and Sharon Stone “horribly mediocre.”

Reuters reports that Madonna has filed a request in New York Supreme Court for a temporary restraining order against the auction house, Gotta Have It Collectibles, to halt the impending sale, writing that Lutz has “betrayed my trust in an outrageous effort to obtain my possessions without my knowledge or consent.”

A representative for the auction house called Madonna’s request “a completely baseless and meritless action, adding that “her intent is nothing more than to besmirch the good reputations of the auction house and Ms Lutz.” They plan to challenge her claims in court.

UPDATE: According to Reuters, today (7/19) Madonna successfully persuaded Justice Gerald Lebovits of the New York State Supreme Court in Manhattan to temporarily block the auction.