Dramatic: Rihanna and Beyonce are both striking in black at the 'Alexander McQueen: Savage Beauty' Costume Institute Gala at The Metropolitan Museum of ArtIt is the fashion industry's night of nights, and as two of the fiercest celebrities around, Rihanna and Beyonce were always going to give the models and designers a run for the money.
Beyonce, who has dropped a few dress sizes in recent months, decided to show off her newly svelte figure in an extremely tight gown by Emilio Pucci last night at the Costume Institute Gala in New York.
And while, other than a cut-out of her décolletage, the 29-year-old singer remained covered up in her breathtaking gown, Rihanna turned heads in a daring Stella McCartney dress that left little to the imagination.
Risqué: From the front Rihanna's lace Stella McCartney gown appears rather demure with just a subtle hint of skin, but as she turned around the daring slashed side was revealedRihanna, 23, dazzled in the lacy number which she teamed with strappy Christian Louboutin heels and long, red braided hair.
From the front, the singer's dress appeared rather conservative with just a subtle hint of skin on show.
But as she turned around, Rihanna revealed a daring slit up the side of the dress, held together with sheer mesh.
Rihanna came close to revealing far too much flesh as she bent down to adjust her train
Breathe in: Beyonce and husband Jay-Z pose for photographers before he and an assistant held her up the stairs in her tight-fitting Emilio Pucci gown
Beyonce was joined by her husband Jay-Z and showed off her figure in a form-fitting black fishtail gown with exquisite gold embroidery.
The stunning dress had a high neck design, complete with a cut out oval panel which revealed her décolletage.
Of course, having her husband by her side proved helpful because the tight-fitting nature of the ensemble meant it the Single Ladies singer needed assistance climbing the stairs.
Facing the photographers: Beyonce puts her eye-catching dress forward for judgement on the red carpet 
Drama: Ashley Greene and Jennifer Hudson dazzle in neutral gowns with dramatic skirts
Pristine: Glamorous Nicole Richie, adventurous Serena Williams and sleek Freida Pinto all chose clean white in very different stylesThe Met Gala is one of the biggest events in the fashion calendar and is held every year at the Metropolitan Museum of Art.
This year the event has been dedicated to designer Alexander McQueen, who took his own life last February.
Beyonce has recently returned to the States from Paris where she has been working on new material ahead of her much anticipated comeback
Radiant in red: Gisele Bundchen paid tribute to Alexander McQueen, Twilight star Kristen Stewart wore patterned Proenza Schouler and Glee actress Lea Michele was chic in silk Escada 
Golden Girls: Sarah Jessica Parker also paid tribute to her friend Alexander McQueen, Gossip Girl Blake Lively in Chanel Couture
She is set to feature on an upcoming track with Jay-Z and Kanye West and is believed to have laid down some vocals while in Europe.
Other guests at the event included Jennifer Lopez, Brooklyn Decker and Rosie Huntington Whitely.
The three ladies all went for pink gowns, with Victoria's Secret model Rosie being the most daring in a dress which was split from the neck down to her navel.
Glistening: Gwyneth Paltrow in a Stella McCartney column dress, Salma Hayek wore floaty Alexander McQueen, Naomi Watts also dazzled in Stella McCartney and Kristen Bell in golden Tory Burch 
Star-spangled: Madonna was more conservative than usual in a blue Stella McCartney gown
Dark beauties: Penelope Cruz wore Oscar de la Renta, Leighton Meester kept it short in a Louis Vuitton dress, and Demi Moore wore Prabal GurungActresses Maggie Gyllenhaal, Eva Mendes along with singer Madonna all wore varying shades of blue.
Maggie's form fitting ensemble appeared to be slightly see-through around the chest while Madonna's attire, complete with silver stars, was a demure choice compared to the more 'out there' designs she usually wears to such events.
Isla Fisher also chose sparkly blue Tory Burch, while Eva Mendes went for an asymmetrical Stella McCartney.
Rock stars and their ladies: Mick Jagger and his designer girlfriend L'Wrenn Scott attended, as did Paul McCartney and Nancy Shevell
Good-looking duos: Orlando Bloom accompanied wife Miranda Kerr, in a ballerina-style dress by Marchesa, while Fergie, also in Marchesa, attended with husband Josh DuhamelMcCartney was a popular choice on the night with Gwyneth Paltrow, Madonna and Iman all wearing designs by the Brit.
Kate Hudson, Jessica Alba, Gwyneth, Sarah Jessica Parker, Kristen Bell, Naomi Watts and Renee Zellweger all chose flattering and dazzling gold gowns.
While gold was the most popular choice of the evening, some brave starlets chose colourful dresses - Isabel Lucas was ethereal in coral Louis Vuitton, Zoe Saldana wore lemon Calvin Klein, while Jinnfer Goodwin snubbed designer labels for a jade green Topshop Unique frock.
Haute Couture twins: Ashley Olsen wore dramatic Christian Dior, while sister Mary-Kate wore bright red Givenchy
Hits and misses: Diane Kruger, in Jason Wu, was a style winner, while Christina Hendricks received mixed reactions for her Carolina Herrera gownThe Olsen twins were typically high fashion in Christian Dior (Ashley) and Givenchy (Mary-Kate) Haute Couture.
The young starlets of screen and song including Blake Lively and Leighton Meester of Gossip Girl, Twilight stars Kristen Stewart, Dakota Fanning and Ashley Greene, Glee's Lea Michele and singer Taylor Swift all managed to shine just as brightly as more seasoned industry names in their colourful assortment of gowns.
The men were not forgotten, with Miranda Kerr, Jessica Also and Fergie bringing along husbands Orlando Bloom, Cash Warren and Josh Duhamel respectively.
Feeling blue: Isla Fisher wore sparkly Tory Burch, Eva Mendes rocked an asymmetrical Stella McCartney 
Young pretty things: Dakota Fanning wore sweet floral Valentino while a grown-up Taylor Swift wore J. Mendel
Plus one: Colin Firth with wife Livia Giuggioli and Anna Wintour with daughter Bee Shaffer
A Star-packed Met Costume Gala for McQueen
Alexander McQueen honoured at Met Gala
source: dailymail