Kelly Clarkson Partied at the White House with 'Cool First Lady': PHOTOS

big day for kelly clarkson

The 2013 Presidential Inauguration Monday was a very big day for Kelly Clarkson, perhaps even more thrilling than her 2002 win on the first season of 'American Idol.'

She sang 'My Country, 'Tis of Thee' for a crowd estimated at 800,000, and later tweeted an image showing her shaking hands with President Obama as VP Joe Biden smiles in the background.  She captioned it, "Maybe the coolest photo I've ever been in...ever."  She also uploaded a backstage girl bonding session with Beyonce.

The historical significance wasn't lost on the entertainer, "What an honor to be a part of history!  Obama's presence was powerful and his words unforgettable.  It's a proud day for America!"

Things continued to be the stuff of fairy tales as Clarkson and her fiance Brandon Blackstock put on their "fancy attire" for a night of hobnobbing at 1600 Pennsylvania Avenue.  While in the car on her way to the most famous residence in the U.S., Kelly tweeted, "My dress barely fit in the car for tonight's festivities.  I feel like Cinderella!  Thank you Oscar De La Renta!"

At the end of the evening Clarkson hit Twitter one last time to gush, "Just partied at the White House...I kid you not, Michelle Obama stood up and got the party started...seriously cool First Lady."

kelly clarkson rocks oscar de la renta at white house

Photos:  Twitter-Kelly Clarkson