Vegas Vixen! Mariah Carey Makes Outrageous Diva Demands During Sin City Residency

Though Mariah Carey is being sued for mistreatment by multiple ex-employees, sources revealed it hasn't stopped the singer from being a high-maintenance nightmare!

According to an insider at Caesars Palace in Las Vegas, where Carey is doing her residency, The Butterfly Returns, the 49-year-old is notorious among hotel staffers for making absurd last-minute requests.

"At one point, Mariah contacted the concierge desk and needed a manicurist within 20 minutes," the insider said. "This was at 9 p.m., and when we couldn't locate one on such short notice, she was not happy."

On another occasion, "Mariah asked if some hotel employees could dress as Minions and come to her villa to entertain her twins — without mentioning compensation!"

These impulsive, unrealistic requests come as little surprise to anyone in the pop star's orbit.

In January she was sued by her former executive assistant, Lianna Shakhnazaryan, who claimed she was "required to meet constant demands of great magnitude."

Shakhnazaryan also said she was "subjected to aggressive, abusive and harmful physical conduct by Carey."

And last April, Mariah's former manager, Stella Bulochnikov, sued her for sexual harassment, alleging that Carey was often naked in front of her and had a substance abuse problem.

Unsurprisingly, the insider at Caesars Palace noted Mariah's current assistant is on the verge of a nervous breakdown.