Beyonce, Kelly Clarkson, Katy Perry, and John Mayer were among the many celebs at President Barack Obama's second Inauguration
The American Idol singer attended the Inaugural Ball with fiance Brandon Blackstock wearing "fancy" ensembles. "My dress barely fit in the car for tonight's festivities. I feel like Cinderella!" Clarkson tweeted. "Thank you Oscar De La Renta!"