President Obama turned 50 today, and even the slow-but-steady collapse of the economy couldn't harsh his vibes last night: the President flew to Chicago for two star-studded (Jennifer Hudson, OK Go, Herbie Hancock) 50th-birthday parties and fundraisers. At one event, more than 1,700 revelers paid $50 or more to attend, while at the second, 100 donors contributed as much as $35,800 apiece to privately dine with the President. "I feel real good about 5-0. Obviously, I've gotten a little grayer since I took this job, but otherwise I feel pretty good," he recently told NPR. But lest you've already forgotten, he wasn't always so gray!

Of course it's not really that surprising that Obama looks somewhat worn down after two-and-a-half years in office. As one card fitfully put it, "Happy Birthday to the youthful energetic President we elected and the old, exhausted President we turned him into." But despite Republicans opposition, the President seemed to have a great time with his well-wishers last night.

And who needs Republicans on your side when you've got Oprah, who pledged her undying loyalty to the President yesterday: “If the campaign needs me [in 2012], I’m happy to be of service. I’m in his corner for whatever he needs me to do.” It's just like when Samwise Ganges pledged his undying fealty to Frodo...just missing the emo soundtrack.

But here's the hard-hitting question everyone has been skipping over: could it truly have been a great birthday without a Marilyn Monroe-type figure popping out of a cake and serenading the Prez? Expectations have been raised! And who would even be Obama's Monroe? J-Lo? Scarlett Johansson? Rev. Al Sharpton??