Stacey Bendet is keeping busy three weeks after giving birth to her second child, Scarlet Haven. She designed a one-of-a-kind gown for Scarlet’s godmother, Vanity Fair’s Amy Fine Collins, to wear to Monday’s Met Ball. Bendet is also opening her second Alice + Olivia shop on Madison Avenue this weekend, and threw a celebratory dinner at The Lion Wednesday night. Dani Stahl, DJ Mia Moretti and violinist Caitlin Moe, Tika Sumpter and Abigail Breslin were among those who dined in tiaras, bright boas and vintage glasses.