Alicia Keys may have a run for her money in Michelle Obama when it comes to girls being on fire -- have you seen the First Lady's bangs?! Still, the man of honor was President Barack Obama, and Keys paid a pretty appropriate tribute to the Commander in Chief at his Inaugural Ball.
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.