Balmain and Lupita Nyong'o. It feels like an unlikely pairing, but the "Eclipsed" Broadway star looked breathtakingly stunning in a three-piece ensemble by the French label on "Late Night With Seth Meyers" on Monday — another winning result of Nyong'o's relationship with stylist Micaela Erlanger. Meanwhile, over at SXSW, First Lady Michelle Obama looked equally fresh in custom 3.1 Phillip Lim while giving a keynote address and taking part in a panel discussion.
Take a look below at the rest of this week's best-dressed, including Kerry Washington in Ulyana Sergeenko couture and Rosie Huntington-Whiteley in Galvan. There's lots of spring style inspiration to be gleaned.