She's says she'll volunteer on Barck's big day, too.

Beyonce reveals how she spent an election night that moved her to tears -- and offers her singing services to Barack Obama on Inauguration Day!

Beyonce tells the Associated Press she was supposed to be in Japan on election night, promoting her new album, I Am … Sasha Fierce. But at the last minute she opted to watch history unfold at home with her family: "I said, 'What am I doing? I'm completely making a bad decision. I have to go home, I'm gonna kill myself if I'm not home in America,"' she says. "I knew I needed to be here."

Overjoyed by Obama's groundbreaking win, she says she "fell asleep crying and smiling at the same time. I woke up with mascara running and a smile on my face!"

Beyonce adds that if the president-elect needs an A-lister to entertain on Inauguration Day, she's available! "I'm there. I can't wait. I feel like all of us, we're ready to do whatever we have to do. Whatever they want -- if they need me to volunteer, they need me to sing, I'm there, and I'm ready."