The 18-year-old actress and singer also changed into another outfit to attend the Republic Records party.
Rita Ora beat Hailee‘s two changes by having three new outfits throughout the evening following her red carpet appearance.
Rita put on a pink and purple dress to kick off the show, a white dress to present on stage, and a two piece outfit for the after party.
FYI: Hailee is wearing a Sophie Theallet dress backstage. Rita is wearing a white Alexandre Vauthier Couture dress on stage.