Newly slim Beyonce and daring racy in lace Rihanna

By DAILY MAIL REPORTER 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