Model Poppy Delevingne wears Marchesa. Picture / Getty Images.
Model Edie Campbell and photographer Mario Testino wear Burberry. Picture / Getty
Dakota Johnson wearing a Gucci silk georgette gown. Picture / Supplied
Bee Shaffer wears Alexander McQueen. Picture / Getty Images.
Sienna Miller in Gucci. Picture / Supplied
Will.i.am in Gucci. Picture / Supplied
Actress Juno Temple wears Erdem. Picture / Getty Images.
Jared Leto wore a custom outfit by Gucci, including a tailcoat with white satin peak lapel and hand carved cane with cat head detail. Picture / Supplied
Anna Ewers with designer Jason Wu. Picture / Getty Images.
Taylor Swift wears a look from Louis Vuitton. Picture / Getty Images.
Alexa Chung wears an outfit by Thakoon. Picture / Getty Images.
Amber Valetta wears a dress by H&M. Picture / Getty Images.
Sarah Jessica Parker wears a custom couture Monse suit. Picture / Getty Images.
Este, Danielle and Alana Haim wear Rodarte. Picture / Getty Images.
Kendall Jenner wears Versace and Cindy Crawford wears Balmain. Picture / Getty Images.
Jaden Smith wears Louis Vuitton and Willow Smith wears Chanel. Picture / Getty Images.
Lady Gaga wears Atelier Versace. Picture / Getty Images.
Jourdan Dunn, Doetzen Kroes and Alessandra Ambrosio wear Balmain. Picture / Getty Images.
Jenna Lyons, Jennifer Konner and Lena Dunham. Picture / Getty Images.
Ashley Olsen and Mary-Kate Olsen. Picture / Getty Images.
Emma Watson wears a dress by Calvin Klein, made out of recycled plastic bottles. Picture / Getty Images.
Lorde wears a tulle gown by Valentino. Picture / Getty Images.
Zendaya Coleman wears Michael Kors. Picture / Getty Images.
Gigi Hadid wears Tommy Hillfiger and Zayn Malik wears Versace. Picture / Getty Images.
FKA Twigs, wearing Versace, and Robert Pattinson. Picture / Getty Images.
Solange Knowles wears David LaPort. Picture / Getty Images.
Brie Larson wears Proenza Schouler. Picture / Getty Images.
Claire Danes wore a light-up gown by Zac Posen. Picture / Getty Images.
Kate Hudson, in a Versace gown, with fashion designer Donatella Versace. Picture / Getty Images.
Miuccia Prada. Picture / Getty Images.