Sunday, May 6, 2012 at 3:56 PM 
The First Lady was in Columbus, Ohio yesterday to introduce the President at a campaign rally held at the Ohio State University. For the event, Mrs. O wore a blue dress adorned with a turquoise Erickson Beamon starburst pin.
Erickson Beamon Tuesday, May 1, 2012 at 11:45 AM 
The First Lady attended the opening ceremony for the Warrior Games at the Olympic Training Center in Colorado Springs, Colorado yesterday. On the style front, Mrs. O turned to one of her classic shilouettes, the sheath dress, updated for spring in a colorblock meets patchwork pattern. Blue heels completed the look, which practically projects fun and cheer!
Update: While the designer has not yet been confirmed, reader Charlene in Detroit observes similarity to the pastel pixel print featured in the Preen Spring 2012 collection, seen here. Red Carpet Fashion Awards also credits the dress as Preen.
Preen Saturday, April 28, 2012 at 10:12 PM 
The President and First Lady are attending the White House Correspondents' Dinner this evening. For the occasion, Mrs. O has chosen a strapless printed gown paired with gold hoop earrings. Gorgeous!
Update: Mrs. O has once again turned to Naeem Khan for a formal event, wearing the designer's strapless paisley print organza ballgown. On the jewelry front, the First Lady wears the "Aurora" earrings by designer Carla Amorim, featuring 18k rose gold with cronaline and orange sapphires, as well as a ring by Sara Weinstock (not seen above, but visible in other photos).
Red Carpet Live Blog [Politico]
Carla Amorim, Naeem Khan, Sara Weinstock Friday, April 27, 2012 at 9:00 PM 
The President and First Lady traveled to Fort Stewart in Hinesville, Georgia today where they met with military service members. For the occasion, Mrs. O paired a full-skirted red dress with an embroidered L'Wren Scott cardigan. (Mrs. O is on a L'Wren Scott kick this week!) A structured black bag and red flats completed the look.
Update: The First Lady also wears a crimson double face stretch wool crepe square neck flare dress by Michael Kors, from the designer's Pre-Fall 2012 collection.
L'Wren Scott, Michael Kors Thursday, April 26, 2012 at 11:01 PM 
The First Lady hosted an event for children in the East Room of the White House today as part of "Bring Your Children to Work Day". For the occasion, Mrs. O debuted a gingham houndstooth pleated skirt paired with a L'Wren Scott embroidered peach cardigan. Lovely!
"Michelle is Us: Wit and Wisdom for Moms From the First Lady" [Huffington Post]
L'Wren Scott