Michelle Obama Keeps It Going In Naeem Khan At National Prayer Service, White House Tour (PHOTOS)

There's no rest for the chic.

Just hours after her stunning Inauguration Day duo of a Thom Browne coatdress and that breathtaking ruby Jason Wu, First Lady Michelle Obama pulled another American designer outfit out of her very stylish pocket: a custom Naeem Khan ivory wool-applique coat with a jeweled neckline and a coordinating dress.

The first lady must've been tired -- her husband, too -- on Tuesday morning, but that didn't stop them from attending the traditional post-inaugural interfaith prayer service at the National Cathedral along with the Bidens.

Khan told Women's Wear Daily that he first made the outfit about a month ago for an unspecified occasion, somthing he says is standard protocol for the first lady's office: There is never a confirmation for what its going to be for. Well, that's not stressful at all.

Luckily for Khan, his gorg ensemble didn't stop there; Mrs. O also wore the outfit -- ditching the coat -- as she and the president (and Bo!) surprised White House tour guests with an impromptu meet and greet, which the White House streamed live on its website. Oh, to have been in that receiving line.

We also love how she pulled her hair up, showing off those fab new bangs.

FLOTUS has worn Khan's threads at least eight times before, including a strapless gold gown for a 2009 state dinner , a sleeveless ivory gown in June 2011 and most recently, this gorgeous printed strapless dress from the 2012 White House Correspondents Dinner.

PHOTOS:

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