John Mayer and Katy Perry arrives for the ceremonial swearing-in of President Barack Obama at the U.S. Capitol during the 57th Presidential Inauguration in Washington, Monday, Jan. 21, 2013. (AP ... more 

John Mayer and Katy Perry arrives for the ceremonial swearing-in of President Barack Obama at the U.S. Capitol during the 57th Presidential Inauguration in Washington, Monday, Jan. 21, 2013. (AP Photo/Carolyn Kaster) less