800000 braved frigid weather at our nation's capical to wath Beyonce(maybe) lip-sync, James Taylor croon "America the Beautiful" and- oh,yeah! - the re-inauguration of the world's most powerful man. But the real fun came latre at the White House, where Barak boogied with stars like Alicia Keys and Katy Perry until 3 a.m. "I like a good party," President Obama said. "I'm a pretty friendly guy