Pool Image / Reuters

The first lady gave a speech this evening at a dinner in support of Chicago's 2016 Olympic bid. In a change of ensemble, Mrs. O wore a custom electric blue jacquard sheath dress by Jason Wu accessorized with a glass pearl necklace by Erickson Beamon. 

Photo by Jewel Samad / Getty Images

The President and First Lady hosted a reception at the White House this afternoon honoring the newly sworn in Supreme Court Justice Sonia Sotomayor.

Mrs. O wore an ensemble we've seen once before, when the first lady toured the gardens at 10 Downing with Sarah Brown in mid-June, seen here. Mrs. O topped her ivory and black patterned dress with a turquoise cardigan, embellishing the look with turquoise accessories. The turquoise starburst brooch is the same Erickson Beamon piece first seen during the Democratic National Convention last August. A stack of turquoise and pearl beaded bracelets completed the look.

We don't yet know the designer of Mrs. O's dress, but hope to have an update soon! Update: Mrs. O wears a black dot twist front tank with eyelash trim, paired with a black embroidered dot micro-pleated skirt, both by Jason Wu.

Image by Jewel Samad / Getty Images

As part of her push for community health care, First Lady Mrs. O traveled to Bowling Green, VA for a ribbon cutting ceremony at Caroline Family Practice, a community health center that received federal economic stimulus funds.

Mrs. O combined her classics today, wearing a fitted blue sheath dress, adorned with a trio of Erickson Beamon floral brooches at the neckline. 

Update: Mrs. O is wearing a Michael Kors blue scoop neck doubleface sheath dress.

Thanks to Janelle for linking to this great video from the event: 

Photo by Alessia Pierdomenico / Reuters

As the President and First Lady arrived in Rome, Mrs. O dazzled in a yellow sheath dress, accessorized with an oversize green brooch at her shoulder. We love that Mrs. O has mixed two of her signatures - a classic sheath and a statement brooch - while introducing a fresh play on color.

Update #1: Mrs. O wears a Jason Wu canary yellow silk faille custom sheath dress. The pin is a rare 1960s vintage piece in paper mache, purchased at Ikram.

For the afternoon, Mrs. O changed ensembles to visit the Coloseeum with her daughters, wearing a white sundress with an Erickson Beamon turquoise brooch pinned at the neckline. The brooch was first seen in August 2008, as Mrs. O opened the Democratic National Convention.

Update #2: Mrs. O wears a white cotton silk dress by Narciso Rodriguez.

Photo by Tiziana Fabi / Getty Images

Photo by volume12 / Creative Commons

Mrs. O will kick off a new music series at the White House today. The first performance will feature members of the Marsalis family, including Ellis, Wynton (above), and Branford, who will play jazz for 150 students, according to the New York Times. More to follow!

Photo by Jewel Samad / Getty Images

Update: For the event, Mrs. O chose a white pencil skirt, pink blouse and Erickson Beamon floral brooch. The brooch, from Erickson Beamon's Victory Garden collection, was last seen during the final presidential debate last fall. Cinching the first lady's waist was the white version of her famed Alaia belt, visible here. Mrs. O finished the ensemble with her Jimmy Choo Lantern heels (which are quickly becoming Mrs. O's shoe of the season!). Meanwhile, we are very excited about Ms. Robinson's pink and navy top, far left.

A detailed view of Mrs. O's Erickson Beamon brooch: