Today's Inauguration of Barack Obama was not only a political Who's Who, but also a musical one as Jay-Z, Beyonce, Kelly Clarkson, Katy Perry, James Taylor and John Mayer watched as Obama was sworn in to his second term as president.
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Clarkson and Beyonce had the additional pleasure of performing for the president, with the Stronger singer tackling My Country 'Tis of Thee and Blue Ivy's momma slaying The Star-Spangled Banner.
After the performance, Clarkson Tweeted, "Wow ... I was incredibly nervous and cold ha! I just wanna officially thank President Obama for opening for me haha! Just kidding :)"
In case you missed either, or just want to watch them over and over and over, we've embedded both videos below!