Hailey Bieber strips down to her underwear for Halloween costume as Carmen Electra in iconic Scary Movie sprinkler opening scene

Hailey Bieber gives a leggy display in  black leather miniskirt alongside husband Justin as they take their dogs for a walk... after rocking Flintstones costumes at celeb Halloween bash

Hailey Bieber brings Pebbles Flintstone back to life in a racy PVC costume as shirtless husband Justin revives Bamm-Bamm at Vas J. Morgan's Halloween party

Hailey Bieber puts on a leggy display in a black mini skirt and knee-high boots as she steps out for coffee in Los Angeles