Queen Of Christmas ... Mariah Carey performs her holiday smash hits in New York City on December 15. Picture: Getty Images Source: Getty Images

A former staffer for Mariah Carey claims the pop diva acted like a slave-driving sweatshop boss — working her to the bone seven days a week without meal breaks or fair pay, according to a new lawsuit.

The New York Post reports Ylser Oliver, 49, pulled 16-hour days for the demanding pop princess starting in March 2007 — on tasks ranging from tidying up the star’s New York City living room to packing her suitcases with performance gear and tending to her “personal needs,” according to the suit filed in Manhattan federal court.

But despite her hard work, she claims she never got paid any overtime from the multi-millionaire singer — who has churned out dozens of chart-toppers such as, All I want for Christmas, Heartbreaker and Hero.

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Getting sued ... Mariah Carey’s former staffer said the singer worked her to the bone. Picture: Getty Images Source: Getty Images

Oliver’s Cinderella-like list of duties also included travelling with the singer, answering phones and shopping for goodies to stock the star’s home, the court papers state.

She was also tasked with “caring for” the singer’s friends and family and arranging for services and repairs to Carey’s home — before quitting in June 2014, the documents state.

“My client put her family’s life on hold while tending to Mariah Carey’s family, and Mariah repaid her by underpaying her,” said her employment lawyer, Matthew Blit.

He added, “My client is a very hardworking woman who treated Mariah and her family like her own, working all hours of the day and night. Even celebrities are required to abide by the law.”

Oliver is suing for a “significant amount of money,” but Blit refused to give a dollar amount.

She was entitled to time-and-a-half pay when working more than 40 hours a week, the suit states.

“[Carey] should have been aware that ... the practices were unlawful,” the lawsuit states.

It’s not the first time Carey has been accused of acting like a brat.

In October, she was accused of pulling her opening act, Australian singer Natalia, simply because Carey couldn’t stand the idea of going on after Natalia.

Divorced ... Mariah Carey has split from the father of her two children, Nick Cannon. Picture: Getty Images Source: Getty Images

And in November, a lawsuit filed against her record label, Def Jam, revealed it costs a stunning $US85,000 ($104,200) to prep the high-maintenance star for a photo shoot.

“I can’t comment on anything that I’m not aware of and we haven’t heard anything about this lawsuit,” said Carey spokeswoman Cindi Berger.

Oliver could not be reached immediately for comment.

This story originally appeared in The New York Post.