Mariah Carey Hospitalized After Believing Michael Jackson, Whitney Houston & Prince Were Coming Over

New details about Mariah Carey's bipolar disorder have been released.

According to The Blast, the "We Belong Together" singer was once hospitalized after thinking Michael Jackson, Whitney Houston and Prince were coming to her house for dinner!

The scary incident allegedly occurred in 2016, and may become part of a legal battle between the diva and her former manager, Stella Bulochnikov. As RadarOnline.com previously reported, the ex-rep accused Carey, 48, of sexual harassment and substance abuse!

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"If this frivolous and baseless claim is filed, we will defend against it vigorously and successfully," said a rep for Carey following the former staffer's allegations.

According to The Blast, Carey's nanny called Nick Cannon one 2016 night after she found the singer "wearing a ball gown and a tiara" as well as a Ring-Pop that she said was gifted to her by "the royal family." At the time, the singer reportedly asked the nanny to get her kids ready for a dinner party with Jackson, Houston and Prince — who were all dead by then.

After hearing about Carey's bizarre actions from the nanny, Cannon called Bulochnikov. Minutes later, the star's entire team arrived at her home and took her to the hospital to receive psychiatric help. She was put on involuntary 5150 hold and later sent to the Beverly Hills Hotel for various weeks, along with a private doctor, to continue treatment. She was soon diagnosed with bipolar disorder.

Speaking of her condition, Carey recently confessed that she was in "denial" for years, but she's learned to accept it and is now taking daily medication to control her mood swings.