Mariah sported a curve-hugging latex costume that showed off plenty of cleavage, which she paired with sequined red horns, wings, and a tiny pitchfork. She completed her devilish look with long diamond earrings and bangles and strappy black platforms.The "We Belong Together" singer made the event a family affair, with her ex-husband, Nick Cannon, and
their 5-year-old twins, Moroccan and Monroe, all getting into the Halloween spirit with her. Roe dressed up as Tangled's Rapunzel, while Roc went as Mario from Super Mario Bros.Even more adorable? Nick, 36, showed up as Luigi!Plenty of Mimi's famous friends also attended the party, including Tamar Braxton, Tamika Harris, Floyd Mayweather, AND Master P.