Katy Perry, Usher and the cast of 'Glee' were on hand to celebrate the inauguration of President Barack Obama for his second term. The festivities began the Kids Inaugural Concert, emceed by Nick Cannon and graced by the First Family and Vice President Joe Biden and Co. as well.
Lady Gaga is getting in on the inaugural fun. What, you didn't think she'd let all of her peers celebrate the swearing in of the president without her, did you? The Mother Monster will reportedly perform at President Barack Obama's second inauguration at a private staff ball on Tuesday, Jan. 22.
Katy Perry was a big supporter of President Obama during the 2012 presidential campaign, and Alicia Keys sang 'No One' at his 2009 inauguration. Both stars are among a diverse group of musicians lined up for the Inaugural Balls on Monday as Obama is officially sworn in for a second term.
