This is E3 Official... Beyoncé Knowles has revealed the song she'll sing for Barack and Michelle Obama's first dance on inauguration night Tuesday. "I am so honored that I will be performing for President Obama and the First Lady,..." "To sing 'At Last' while they have their first dance is a dream come true," she says. "I could not be more honored and excited that they have asked me to be part of this moment in history." Knowles had been vocal about wanting to be a part of Obama's inauguration. "I'm there. I can't wait," she said in November. "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." Watch Beyoncé's as she covers the Etta James classic 'At Last' below:

Usher's wife, Tameka Foster (Raymond), will NOT be the latest Georgia Peach to join ATL's "Real Housewives." Tameka recently made a statement saying: "Although [Bravo] approached me, and I was flattered by the offer, I will not be joining the 'Real Housewives' cast." The mother of five has been busy raising her sons and creating her apparel line. Tameka welcomed her second son, Naveid Ely, with her pop star hubby last December. The couple had their first son, Usher V, in November 2007.

A source close to Nick Cannon has confirmed exclusively to Latina.com that Cannon and Mariah Carey are married! The couple wed yesterday in a small ceremony on an island and it was "very implusive," according to our source. The wedding was attended by a few close friends of the couple, including Da Brat.