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: 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.

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

Images by Jason Reed / Reuters

This morning the president and First Lady Mrs. O were joined by Spanish Prime Minister Jose Luis Rodriguez Zapatero for the 58th US National Prayer Breakfast in Washington, D.C.

Mrs. O was dressed in a plum silk dress, paired with a long sleeve top underneath and a thin belt at the waist. This is the same Narciso Rodriguez dress Mrs. O wore to attend the president's address to a joint session of Congress in February 2009. The notable addition for this appearance? Sleeves, of course!

Was this Mrs. O's tongue-in-cheek, sartorial rebuttal to "sleeve-gate"? Or perhaps the first lady simply getting mileage out of her wardrobe? Would love to hear your thoughts on the 2010 remix.

Photo by Mark Wilson/Getty Images

Mrs. O wears a dress by Rachel Roy (which first debuted in the summer of 2009, seen here) for her multi-part interview with Mr. Matt Lauer for the Today Show. In the second video, Matt asks Mrs. O a few questions about her style (kisses and hugs for that!). A few of Mrs. O's responses follow below.

On making her fashion choices: "I'll figure out what I'm going to wear over the course of a week or even two, so that I don't have to think about it."

On dealing with the attention: "I've learned: wear what I like, wear what's comfortable...and that really depends on the occasion."

And the criticism: "I don't take in a lot of feedback in that regard because you don't want comments like that to influence who you are. You can't feed on any negative. I just sort of find a way to keep that out, and if there's any criticism that's helpful, I take that in and try to learn from it."

Image by Saul Loeb / Getty Images

First Lady Mrs. O met with cabinet and senate members in the Old Family Dining Room of the White House today to discuss her campaign to fight childhood obesity. The full initiative will be unveiled next week.

For her business meeting, Mrs. O looked smart and polished in a red herringbone suit by Peter Soronen. The suit originated from Peter Soronen's Fall Winter 2006 collection and was first worn by Mrs. O on the campaign trail in early 2008. A white blouse and pearls complement this timeless classic.