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.
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!