Pop music icon Lady Gaga sang the Star Spangled Banner at Joe Biden's inauguration.
She is not the first superstar to take that stage; Bruce Springsteen and Beyonce have also sang the national anthem at a presidential inauguration.
Despite his celebrity, the performer at Donald Trump's inauguration was a relatively little known singer named Jackie Evancho.
Ms Evancho gained some notoriety for her appearance on "America's Got Talent" when she was 10 years old.
Mr Trump was actually the second president Ms Evancho had sung for; prior to performing at his inauguration, she sung for Barack Obama during the national Christmas tree lighting ceremony.
The young singer faced criticism for her decision to accept Mr Trump's invitation to sing - many other artists had turned him down - but she ultimately decided to sing.
She has since said she regrets the "damage" caused by her performance.
"I definitely do have some things that I really wish that I could go back and change or fix, especially with my influence with the LGBTQ community," she told USA Today. "Because ever since I sang at the inauguration, they feel like I'm not with them, but I absolutely am and I'm frustrated with the fact that it changed their opinions of me. And I just want them to know that I do advocate for them wholeheartedly and I support them completely."
Ms Evancho has a sibling who is transgender.