The Obama family, foreground, with Jill Biden and family at the Kids’ Inaugural Saturday night. (Joe Raedle/Getty Images)

Plus, scads of unofficial parties all over town last night; you can get their vibe from the tweets and Instagrams by our many correspondents on the Inauguration Grid. And tune back later to see who won Dan and Monica’s “Running of the Balls” competition. Judges are still deliberating. . . . More all-day coverage on the Inauguration Live Blog.

And what’s this now? The Associated Press cites a source who says that Lady Gaga will play the private inaugural party for White House staffers on Tuesday.

Looking for Friday’s Reliable Source? Start here: Oprah Winfrey: This time, absent from the Obama inauguration and campaign