It 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.
Dramatic: Rihanna and Beyonce are both striking in black at the 'Alexander McQueen: Savage Beauty' Costume Institute Gala at The Metropolitan Museum of Art
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 revealed
Rihanna, 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.
Rated R: 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
Facing the photographers: Beyonce puts her eye-catching dress forward for judgement on the red carpet
