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).

Hose down, anyone?

See firefighters Mariah and Nick on duty below