Superstar Mariah Carey’s brother is throwing some serious shade at the diva, claiming that she is "evil" and a “witch,” who refuses to pay the medical bills for her dying sister.

The Sun reported that Carey’s own brother, Morgan, made several claims about his famous sister including that she will not help pay for the procedures their sister needs.

According to Morgan, their sibling Allison, a 54-year-old former prostitute, has been diagnosed with HIV and needs brain and spine surgery, but Mariah won’t help out.

“Your sister is dying and she is struggling and where are you? You think you are fabulous, but you are a witch,” Morgan said, blasting Mariah.

Carey and Allison have not spoken to each other since a fight they had in 1994 and Morgan hasn't spoken to the star in years now either, which could make his claims baseless because of their family feud.

He also slammed his sister last year, alleging that she had a drinking problem. And when it comes to her engagement to billionaire James Packer, Morgan kept up the insults.

“I don’t even think Mariah is in love with James, she’s only in love with herself. She is evil.”

So far Carey has not responded to his claims.