The singer is on fire!...
Mariah Carey may or may not have sent temperatures soaring with her choice of Halloween costume - sparkly underwear with a firefighter's jacket.
The singer partied the night away in red skimpy lingerie and suspenders and completed her 'fireman' look with a helmet and jacket.
The Hero star rocked up to the Marquee Night Club in New York on a fire truck with husband Nick Cannon, who wore a matching costume (minus the underwear).
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