Photo by Mandel Ngan / Getty Images

Tuesday marks the official launch of the First Lady's campaign against childhood obesity, and it seems Mrs. O media appearances will abound.

Per Lynn Sweet of Daily Flotus:

Mrs. Obama's East Wing said she will be "joined by members of the president's cabinet, as well as media, sports, entertainment, and business leaders," plus mayors, member of the medical community and others at the White House event. On Tuesday evening, Mrs. Obama will sit down with CNN's Larry King for an interview about obesity and her first year as first lady. She will take questions from viewers.

Additionally, Mrs. O will appear on Good Morning America, a first peek of which we have here:

On a style note, the first lady is wearing an ivory double face wool sheath dress and jacket from Talbots for her interview with Robin Roberts. Mrs. O first wore the dress in November for a White House classical music event, seen here. Completing the ensemble is a pair of knee high boots in camel.

Update #1: Mrs. O's Super Tuesday is off and running! This morning the president signed a memorandum as part of Mrs. O's campaign to combat childhood obesity. The president and first lady were joined by Education Secretary Arne Duncan, Health and Human Services Secretary Kathleen Sebelius, Agriculture Secretary Tom Vilsack, and Interior Secretary Ken Salazar in the Oval Office of the White House.

For the signing, Mrs. O wore a teal dress with printed top, paired wtih a coordinating teal cardigan. A statement brooch by Erickson Beamon completed look. See photo above.

Update #2: The first lady has just unveiled a new website for her campaign against childhood obesity, Let's Move. In the email introducing the website, Mrs. O writes:

"The problem is clear. Over the past three decades, childhood obesity rates in this country have tripled. Today, obesity and excess weight threaten the health of one out of three American children. It’s time for us to act. That's why I’m asking you to be part of Let's Move! -- a nationwide effort to solve the obesity epidemic within one generation."

The site also includes this video from Mrs. O (wearing a J.Crew cardigan for the seated interview):

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