Monday, August 20, 2012 at 8:40 PM 
The Obamas attended church at St. John's Episcopal Church in Washington, D.C. yesterday. For the occasion, Mrs. O rewore a circa 1950s Blue Ribbon Lace Dress from New York Vintage paired with a cropped white cardigan.
New York Vintage Thursday, August 16, 2012 at 7:16 PM 
Mrs. O attended a campaign rally in Iowa yesterday, rewearing her ASOS Midi Dress in Check Print, previously seen here. For the second spin, Mrs. O paired the dress with a royal blue belt and metallic flats. Lovely!
ASOS Monday, August 13, 2012 at 7:32 PM The First Lady will appear on The Tonight Show with Jay Leno at 11:35PM EST on NBC this evening. For the appearance, Mrs. O wears a yellow floral dress with a sheer inset and metallic belt.
Update: The First Lady wears Bibhu Mohapatra as confirmed by the designer on Twitter (thanks njmrso for the tip!).
Bibhu Mohapatra Sunday, August 12, 2012 at 11:47 AM 
The First Lady made a surprise visit to the Medical Center of Aurora yesterday, where she met with victims of the Aurora, Colorado shootings and hospital staff.
From Colorado, Mrs. O headed west, attending several campaign fundraisers in the Los Angeles area today, including a "family day" at Gwen Stefani's house. Tomorrow night Mrs. O will appear on the Tonight Show with Jay Leno. Stay tuned!
Friday, August 10, 2012 at 1:07 PM 
The First Lady made stops in eastern Pennsylvania yesterday, where she spoke with campaign supporters in Philadelphia and Bethlehem. On the style front, Mrs. O wore a black and white floral dress, paired with her signature Alaia belt and a double strand of pearls.
Update: Mrs. O wears a Tracy Reese Black/Pearl Deconstructed Frock, available here.
Tracy Reese