Halsey was in attendance and performed at the 2018 amfAR Gala New York on Wednesday (February 7)
After her appearance on the redcarpet she changed into a one-sleeve embellished sheer Julien Macdonald Spring 2018 gown for her performance .
Halsey In Julien Macdonald Performing @ 2018 amfAR New York Gala
