Popsugar Fashion Celebrity Fashion Halsey Black Slitted Dress at amfAR Gala 2018 Halsey Wore the Highest Slit at 1 of the Biggest Fashion Parties of the Year — Would You Dare? 8 February 2018 by Sarah Wasilak View On One Page Photo 5 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 She Changed Into This Julien Macdonald Number to Perform Previous Next Start Slideshow Celebrity FashionSlitHalseyAmfAR GalaFashion PollAll AnglesLorraine SchwartzGeorges HobeikaJimmy ChooAmFAR