Celebrities walk the Red Carpet at the annual Met Gala 2015

The Met Gala, formally called the Costume Institute Gala and also known as the Met Ball, is an annual fundraising gala for the benefit of the Metropolitan Museum of Art's Costume Institute in NYC. It marks the grand opening of the Costume Institute's annual fashion exhibit. Each year's event celebrates the theme of that year's Costume Institute exhibition, and the exhibition sets the tone for the formal dress of the night since guests are expected to choose their fashion to match the theme of the exhibit.  
This years theme is "China: Through The Looking Glass" and the celebs show cased their best interpretation of this years theme. 

Rihanna in Guo Pei, Fall 2010 Couture #Fav

Under this amazing coat she is rocking a custom-made pink bustier by Agent Provocateur, Christian Louboutin glitter pumps. Headpiece by Guo Pei and gold necklace by Cartier

Solange Knowles in Giles, Fall 15 #Fav

Katy Perry in Moschino matching with the Designer Jeremy Scott

Beyonce in Givenchy Haute Couture by Riccardo Tisci  #Fav

Kim Kardashian in Peter Dundas for Roberto Cavalli with hubby Kanye West #Fav

Amal Clooney in Maison Margiela Couture gown with hubby George Clooney

Jennifer Lopez in Versace

Zoë Kravitz in custom Alexander Wang, Fall 15

Designer Christopher Kane and FKA Twigs in a creation by Kane

Chloe Sevigny in J.W. Anderson

Sarah Jessica Parker in H&M gown, Head piece by Philip Treacy with Andy Cohen

Taraji P. Henson in Balenciaga and Alexander Wang

Lady Gaga in Balenciaga

Singer Cassie looks lovely in Zuhair Murad with Sean 'Puffy' Combs

Zendaya in Fausto Puglisi

Rita Ora in Tom Ford

Donatella Versace

Olivia Munn in J. Mendel

Allison Williams in bright red Giambattista Valli Custom Haute Couture with the Designer #FAV

Anne Hathaway in Ralph Lauren

Alicia Keys in Jean Paul Gaultier Spring 15 Couture, with the Designer

Kerry Washington in Prada #Fav

Miley Cyrus in Alexander Wang

Keri Russell in Altuzarra 

Jennifer Connelly in Louis Vuitton

Anna Wintour in Chanel Spring 15 Couture with daughter Bee Shaffer #Fav

Image via Getty images

Jennifer Lawrence in Christian Dior, Spring 15 Couture

Emily Ratajkowski #Fav

Brie Larson 

Katie Holmes in Zac Posen, cute dress but not sure about the hair

Courtney Eaton 

Lily Collins in Chanel Couture, Spring 15

Kate Hudson in Michael Kors

Olivia Wilde in Prada with Jason Sudeikis 

Emily Blunt in Prada

Kendall Jenner in Calvin Klein

Eastern influence: The exhibition explores the way Chinese art and aesthetics have been interpreted by the West over the years; Image via Getty images