Steven A. Cohen, head of SAC Capital Advisors, arrived with his wife, Alexandra, who wore red open- toed shoes that matched the carpet leading in to the Metropolitan Museum of Art's Costume Institute Ball. Penelope Cruz entered with Oscar de la Renta, Beyonce with Jay-Z...Fashion and wealth blended on this evening for one of the biggest museum fundraisers on the planet. Tables, which were sold out months ago, went for $100,000 to $250,000...As for the fit of a tuxedo, “This is one instance where size matters,” said menswear designer Simon Spurr, who wore a tie with a scorpion printed on it. “Buy one size smaller than you think.” However sexy a uniform a tuxedo can be, Stella McCartney suggested a man’s sex appeal comes from within, citing McQueen as a role model. “Have a personality, be true to yourself, and don’t conform in any way,” she said. [Bloomberg via BI]