Wednesday, August 24, 2011 at 9:12 AM 
Photo by Jim Watson / Getty Images
The First Lady went for a bike ride with her family on Martha's Vineyard yesterday. Mrs. O's cycling gear? A Tom Binns x John Eshaya t-shirt, last seen in September 2010, here, paired with purple shorts, sneakers and a helmet, of course.
Tom Binns x John Eshaya Monday, August 22, 2011 at 2:14 PM 
Photo by Vince DeWitt / Getty Images
The President and First Lady picked up dinner at Nancy's Restaurant in Oak Bluffs, Massachusetts, while vacationing on Martha's Vineyard this weekend. For the outing, Mrs. O paired a black tank with a pleated color block skirt. Hoop earrings and black sandals completed the weekend casual look.
Update: Mrs. O wears a Spring Summer 2011 skirt from Suno, seen here. (Thanks Kemi!)
Suno Saturday, August 20, 2011 at 9:35 PM 
Official White House Photos by Chuck Kennedy
The Obamas are currently enjoying a weeklong holiday on Martha's Vineyard. While they're away, we can enjoy these White House Flickr Photos, taken July 15 during a taping for the Presidential Active Lifestyle Award challenge and Nickelodeon's Worldwide Day of Play on the South Lawn of the White House.
Showing off her Double Dutch skills, Mrs. O wears an of-the-moment red and navy stripe sweater, paired with slim black pants and red flats. Cute!
Monday, August 8, 2011 at 9:00 AM 
Image by Ron Sachs / Getty Images
The President and First Lady, joined by daughters Malia and Sasha, as well as nephew Avery Robinson and family friend Roxanne Nesbitt, returned to the White House on Sunday following a weekend retreat at Camp David.
For the return trip, Mrs. O dressed in a vibrant floral skirt, paired with a blue tank and yellow short-sleeve cardigan. For those who sense something familiar, the First Lady donned the same skirt during a trip to Mumbai in November 2010, seen here. It's one of those pieces that remains a mystery. Any tips on the designer would be greatly appreciated!
Update: Hooray for reader "tuesde"! Indeed, Mrs. O wears a Gregory Parkinson skirt from Spring Summer 2011, seen here.
Gregory Parkinson Thursday, August 4, 2011 at 7:21 PM 
Photo by Kevin Dietsch / Getty Images
The question du jour: Where is Mrs. O? I can only wager a guess, which would be that perhaps the First Lady is celebrating her husband's 50th birthday and enjoying a short respite away from the public eye. Until we see Mrs. O next, I've collected these tidbits from around the web to occupy the collective us. Enjoy!
8/3: "Michelle Obama doing a mother-daughter spree with Sasha and some friends in Bethesda Wednesday afternoon — lunch at Redwood and a stop at pottery shop All Fired Up." [The Reliable Source]
8/4: "The White House staff will toast the president in a midday gathering in the Blue Room. In the evening, a dinner party is planned for family and friends, including some from Chicago. First daughter Malia is also coming home from summer camp today to celebrate her father’s big birthday." [ABC News]
On a related note, Mrs. O sent out an email asking supporters to sign President Obama's birthday card today. [USA Today]
Bonus: A new photo of Mrs. O and Ty Pennington, host of Extreme Makeover: Home Edition, at the White House. [Flickr]
And finally: the President and First Lady were named to Vanity Fair's International Best-Dressed List as a Best-Dressed Couple. [Vanity Fair]
Update (8/9): Mrs. O is visiting her brother Craig Robinson and his family in Corvallis, Oregon. [Chicago Sun-Times]