Alexandre Birman is rocking New York this week. On Thursday, he was judge to a pageant of customers at Saks 5th Avenue, next to Carol Trentini and a bunch of fashionistas, and then went to a charity event at Bergdorf Goodman, on behalf of the New York City AIDS Fund. On Saturday, Alexander is still in charge of the launch of his new collection at Saks, with stylist Brad Goreski, former assistant to Rachel Zoe.