Jessie J going all old Hollywood in this Ralph and Russo ensemble

Rihanna reminiscent of all the prom dresses you wore in this Giambattista Valli puff cloud of a dress

Kim Kardashian taking a risk with a Jean Paul Gaultier, although we're wondering what she's wearing underneath we have to say it looks very good on her!

Jennifer Hudson who is also wearing a Tom Ford looks simple and very feminine