Ariana Grande stunned on the Wicked red carpet in a blush pink Vivienne Westwood Couture gown in Sydney, Australia.

Ariana Grande swapped her Glinda-fied pink wardrobe for a couture bridal gown last night in New York ... in a crystal-embroidered green slipdress layered over a sleeveless gray knit top and ...

The ball gown was constructed from layers of pink tulle and covered in peach crystal details forming a Starburst form, originally drawn by Westwood and frequently seen in her collections since 2010.