Alicia Keys sings the national anthem before the NFL Super Bowl XLVII football game.
Alicia Keys says heels are her version of cleats. Robin Williams says he's rooting for the Niners. Golden State Governor Jerry Brown says, "we're all pulling for you."
Oh, and President Obama looked pretty good with a pigskin in his hands on the porch of the White House.
These celebrities and more all had things to "say" on Twitter about Sunday's biggest event: the Super Bowl between the San Francisco 49ers and the Baltimore Ravens.