Maria Pinto Red Dress
Left: At a Medal of Honor presentation October 6, 2010 at the White House.
Right: In November 2008 with former Pres. George W. Bush and Laura Bush. Photos: MANDEL NGAN/AFP/Getty Images
Jason Wu Dress
Left: Arriving in Florida with daughter Sasha, August 2010. Photo: MANDEL NGAN/AFP/Getty Images.
Right: Attending the Marine Corps Evening Parade, July 2009. Photo: JEWEL SAMAD/AFP/Getty Images
Yellow Tiered J. Crew Skirt
Left: At Red Rock National Conservation Area with Harry Reid, June 2010. Photo by Ethan Miller/Getty Images.
Right: Visiting the 'Palazzo del Governo' of L'Aquila in Italy, July 2009 during the G8. Photo by Vittorio Zunino Celotto/Getty Images
Diane Von Furstenberg Skirt
Left: Getting out the vote for Harry Reid in Las Vegas. Photo by Ethan Miller/Getty Images.
Right: Speaking on health care legislation at the White House, September 2009. Photo by Win McNamee/Getty Images.
Tracy Reese Floral Dress
Left: Walking their first dog Bo to a picnic for Congress, June 2010. Photo: Gary Fabiano-Pool/Getty Images.
Right: Arriving in Mexico City, April 2010. Photo: LUIS ACOSTA/AFP/Getty Images.
Left: Returning to the White House after a long trip, July 2009. Photo by Brendan Smialowski-Pool/Getty Images
Right: Campaigning with the Bidens in August 2008 in Illinois. Photo by Joe Raedle/Getty Images.
Tracy Feith Dress
Left: Greeting First Ladies from various countries in New York as part of her healthy eating program. Photo by Hiroko Masuike/Getty Images.
Right: Attending the National Prayer Service on Pres. Obama's first day in office, January 2009. Photo by Win McNamee/Getty Images
Moschino Floral Suit
Left: Promoting healthy eating and active lifestyles in May 2010. Photo: SAUL LOEB/AFP/Getty Images.
Right: Meeting with Queen Silvia of Sweden in the White House, October 2009. Photo: White House/Samantha Appleton
Jonathan Saunders Dress
Left: Hosting a Remarkable Women dinner for Women's History Month, March 2011. Photo by Chip Somodevilla/Getty Images.
Right: With Caroline Kennedy at the funeral service for Sargent Shriver, January 2011. Photo by Cliff Owen-Pool/Getty Images.
Moschino Print Dress
Left: Speaking at the Clinton Global Initiative (CGI) in September 2010. Photo by Brian Harkin/Getty Images.
Right: Hosting a Mother's Day event at the White House with her mother Marian Robinson, May 2010. Photo by Alex Wong/Getty Images.
Zero + Maria Cornejo Dress
Left: May 2010 at the White House. Photo by Olivier Douliery-Pool/Getty Images.
Right: Michelle Obama meets with first ladies of other countries, September 2009. Photo by TOSHIFUMI KITAMURA/AFP/Getty Images.
Tracy Feith Dress
Left: With First Lady Svetlana Medvedeva of Russia, right, at the White House, June 2010. Photo: White House/Lawrence Jackson.
Right: Shopping in Paris with daughters Malia and Sasha. Photo: MIGUEL MEDINA/AFP/Getty Images.
Michael Kors Teal Dress with Bow
L: At the 2010 National Medal of Arts and National Humanities Medal ceremony in March 2011. Photo: Mark Wilson/Getty Images
R: Thanking volunteers who helped decorate the White House during Christmas 2009 season. Photo: SAUL LOEB/AFP/Getty Images