Kelly Clarkson was one of the performers at President Obama's second inauguration Monday, performing "My Country, 'Tis of Thee" backed by the United States Marine Band.

It's a far cry from December 2011, when the singer announced her support of then-Presidential candidate Ron Paul. Clarkson, who refers to herself as "a Republican at heart", later said she would back Obama "again" after he voiced his support of gay marriage. 

Here's the performance.