Kelly Clarkson joined James Taylor and Beyoncé in celebrating Barack Obama today at the 57th Presidential Inauguration, shaking off some early nerves to deliver an electrifying rendition of "My Country, 'Tis of Thee." The singer looked meek early on but cracked a smile as she enjoyed the moment, then settled into a commanding groove soon enough, delivering a gigantic ending that left Senator Chuck Schumer in awe.

Tonight's inaugural celebrations feature Alicia Keys, Usher, Soundgarden, Stevie Wonder, fun. and more.