So what's Beyoncé got to cry about anyway? Singing "At Last" for the Obamas' first dance as president and first lady. She tells the magazine how nervous she was before going onstage and rocking it:
"I had to tell myself, 'They asked you to do this. You have to do a great job. This is their history. Calm down. Calm down.' I barely made it. Literally seconds before the song started, I was crying like a 5-year-old."