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Mariah Carey is facing a new legal challenge.

The star's sister Alison has reportedly filed a court summons stating she's seeking $1.25 million from her superstar sister, according to People magazine.

In the suit, Alison alleges that the "We Belong Together" singer, 50, included multiple stories in her recent memoir "The Meaning of Mariah Carey" that intentionally inflicted "emotional distress" on Alison.

Furthermore, the suit refers to Carey as "heartless, vicious [and] vindictive," and states that Alison has begun abusing alcohol and is "uncharacteristically tearful" after the book's release.

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Mariah Carey is being sued by her sister Alison, who alleges 'emotional distress' came from the publication of the singer's memoir, 'The Meaning of Mariah Carey.' (Photo by Jamie McCarthy/Getty Images)

Mariah Carey is being sued by her sister Alison, who alleges 'emotional distress' came from the publication of the singer's memoir, 'The Meaning of Mariah Carey.' (Photo by Jamie McCarthy/Getty Images)

In the book, Carey alleges that Alison gave her Valium and tried to "pimp her out" and threw boiling hot tea on her, per People, a story which Alison cites in the summons and claims "presented no evidence to substantiate."

"[Carey] also callously dismisses [Alison] as her 'ex' sister," said the legal doc. "But instead of saying no more about her, [Carey] used her book to humiliate and embarrass plaintiff as stories about the memoir appeared in newspapers around the world, on TV and across the Internet, most of them with headlines repeating defendant's allegations — all of them published without giving [Alison] any opportunity to respond."

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The docs also say that Alison has been diagnosed with PTSD, anxiety and depression, and is now utilizing therapy to process "the horrific abuse" she allegedly suffered as a child, which includes incidents she's described as "satanic" in a lawsuit against their mother, Patricia.

The summons also accuses the "Precious" star of using her "status as a public figure to attack her penniless sister" in order to promote her book by creating "sensational" headlines.

Mariah Carey's story about Alison giving her Valium was cited as among the reasons that Alison has now begun abusing alcohol. (Photo by Kevin Winter/Getty Images for iHeartMedia)

Mariah Carey's story about Alison giving her Valium was cited as among the reasons that Alison has now begun abusing alcohol. (Photo by Kevin Winter/Getty Images for iHeartMedia)

Additionally, Alison claims she has sent an offer to settle to Carey's attorneys but "no response has been received."

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Alison is seeking $1.25 million for the "intentional infliction of immense emotional distress caused by [Carey's] heartless, vicious, vindictive, despicable and totally unnecessary public humiliation of defendant's already profoundly damaged older sister."

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A rep for the singer did not immediately respond to Fox News' request for comment while a rep for Alison declined to comment.