Obama Sings Happy Birthday to Ted Kennedy!

The who's who of DC gathered at the Kennedy Center tonight to wish Senator Ted Kennedy a happy 77th birthday. Bill Cosby hosted the event, and Lauren Bacall, Bernadette Peters, and James Taylor performed for the audience. Cosby wasn't the only person to make a joke. Teddy's niece Caroline, who saw her dreams of being a lawmaker fail this year, quipped: "I never thought I'd be in a room with so many senators."

One of those senators, Claire McCaskill, was in the audience, and shared the event with her followers on Twitter. She tweeted: "The Pres arrived at the end to lead us in singing Happy Birthday to Ted. Happy & sad."

Happy Birthday, Mr. Senator.