MICHELLE’S CHOICES: In her first few weeks in the White House, First Lady Michelle Obama has remained true to her fashion philosophy of embracing a diverse crop of American designers, with a particular penchant for emerging talent. On Sunday, she once again turned to Jason Wu for a violet raw silk sheath dress with embroidered knots as she welcomed students from the L’Academy de Cuisine to the White House kitchen. Later that evening, at the Governors’ Dinner, Obama donned a sequined gown by Chicago native Peter Soronen. And at her husband’s first address to Congress on Tuesday night, she turned to another one of her designer favorites, wearing a sleeveless plum silk dress by Narciso Rodriguez. The First Lady also introduced another name to her stable of fashion designers since moving to Washington: She rocks a Guipure lace kimono dress by Tracy Reese on the cover of People magazine, which hits newsstands this Friday.