Thursday, August 5, 2010 at 2:01 PM 
Image by Pepe Marin / Reuters
Image by Cristina Quicler / Getty Images
Mrs. O was out and about in the southern Spanish town of Granada today, wearing a brightly-colored floral top, belted at the waist and paired with cropped black leggings and Maison Martin Margiela sandals.
Alaia, Maison Martin Margiela Sunday, June 27, 2010 at 5:03 PM 
AP Photo/The Canadian Press, Paul Chiasson
The president and first lady are in Toronto for the G20 Summit this weekend. For the first official state dinner, Mrs. O dazzled in white Alaia. Gorgeous!
Update: Per the Huffington Post, via the Pool Report, Mrs. O is also wearing 'vintage costume jewelry from a company in Toronto called n&n vintage.'
Alaia Thursday, May 27, 2010 at 12:22 PM 
Image by Alex Brandon / AP Photo
Also yesterday, First Lady Mrs. O was at the Eisenhower Executive Office Building to announce a $45 million commitment by several foundations and private philanthropists to be used as matching funds for social programs chosen by Social Innovation Fund. For more information on the fund and donations, click here.
For her appearance, Mrs. O wore a black dot twist front tank with eyelash trim, paired with a black embroidered dot micro-pleated skirt, both by Jason Wu. The ensemble first debuted last summer, seen here, actually here (thanks Bevi!). Yesterday, Mrs. O paired the ensemble with her signature Alaia belt and a stack of diamond bangles.
Sunday, February 21, 2010 at 7:24 PM 
Image by Jewel Samad / Getty Images
Image by Kris Connor / Getty Images
In preparation for this evening's Governors Ball, the first lady hosted a music preview event at the White House this afternoon, featuring Grammy-winning composer and singer Harry Connick Jr. who performed for an audience including young glee club members from a local Washington, D.C. elementary school.
For the event, Mrs. O debuted a sleek new version of her bob haircut, wearing a v-neck dress with a patterned blouse top, paired with an Alaia belt and bolero.
Update: Mrs. O wore a custom sheath dress with gathered leaf print chiffon bodice by Jason Wu.
Friday, February 5, 2010 at 12:32 PM 
White House Photo by Pete Souza
Purple has certainly become Mrs. O's color of the season. Above Mrs. O is pictured as the first couple honored retiring White House butler James Ramsey on January 25th. Mrs. O wore a purple velvet cut-out jacket by Azzedine Alaia, which coordinates with the dress worn for Oprah's White House Holiday Special in December, below. For last week's event, Mrs. O paired the jacket with slouchy purple trousers and a printed blouse by Peter Pilotto (thank you, chrystelle, for identifying the latter).
White House Photo by Pete Souza
Alaia, Peter Pilotto