Alicia Keys, Brad Paisley, Usher, Katy Perry and the cast of TV's
Glee are among the stars announced today who will sing at President Obama's inaugural balls on January 21st, as well as a children's concert set for the 19th. 
 

Beyonce, Kelly Clarkson and James Taylor were previously announced as the performers at the actual January 21st
ceremony on the West Front of the Capitol.