Imani William's leopard catsuit was a definite show-stopper during Sigala's second Monster Mash-Up! This image appears in the gallery:#MonsterMashUp 2016: ALL The Photos From Last Halloween's BIGGEST Party 5. Imani William's leopard catsuit was a definite show-stopper during Sigala's second Monster Mash-Up! (Pic: PA) 77 images See the full gallery: #MonsterMashUp 2016: ALL The Photos From Last Halloween's BIGGEST Party