Former President Barack Obama arrived at the U.S. Capitol on Monday for President-elect Trump’s inauguration ceremony without former First Lady Michelle Obama.

Former first lady Michelle Obama won’t attend President-elect Donald Trump’s inauguration, though former President Barack Obama will be there, the Obamas' office said in a statement. No reason was given.

President-elect Donald Trump selected opera tenor Christopher Macchio to perform the national anthem at Monday’s inauguration, at which Carrie Underwood will also perform “America the Beautiful.” Here’s a list of some singers at previous presidential inaugurations,