Barack: An In-Depth Look

Barack Obama has been sworn into the presidency for a second time -- just in case!

Chief Justice John Roberts administered the presidential oath of office to Obama for a second time, after Roberts blew his lines on Tuesday, causing the Commander-in-Chief to repeat the wording differently from how it reads in the Constitution.

White House Counsel Greg Craig released a statement regarding the unusual ceremony that reads: "We believe that the oath of office was administered effectively and that the President was sworn in appropriately yesterday. But the oath appears in the Constitution itself. And out of an abundance of caution, because there was one word out of sequence, Chief Justice Roberts administered the oath a second time."

The President and the Chief Justice performed the redo in the Map Room of the White House on Wednesday night.

Just hours after his swearing-in ceremony, President Obama kicked off the night by dancing with wife Michelle to Beyoncé's rendition of "At Last" -- and that was just at the first ball!

The President attended ten inaugural balls last night, but made time to give ABC's Robin Roberts his first interview as Commander-in-Chief! "We're going to have a lot of work," Obama said of assuming office, "so tonight I'm just going to soak in the atmosphere."

First Lady Michelle revealed to ABC's Bob Woodruff that so far life in Washington isn't as crazy as it may seem -- and the changes that D.C. has brought to her family have been welcome! "It's a bit surreal," confessed Michelle. "We have had more normal now than we've had in a long time -- we have dinner with Barack every night and we haven't done that for two years."

Life may be calming down for the First family, but Hollywood is still on an inaugural high! Even superstar Beyoncé, who serenaded the first couple, was star-struck and humbled by the occasion. "I'm so proud of my country -- this man was born for this," the choked-up singer revealed to ABC. "I'm just so lucky to be a part of this history. It's probably the most important day of my life and I'm so grateful."

Hill Harper, Obama's friend from Harvard Law and "Extra's" D.C. tourguide, revealed that his future has changed too. "I'll never refer to him for the rest of my life by his first name. He will be Mr. President to me, even though I've known him 20 years -- he'll be Mr. Obama and Mr. President because he's earned that title -- that is who he is."

President Barack Obama confers with White House Chief of Staff Rahm Emanuel in the Oval Office during his first day on the job.

Barack Obama officially became the country's 44th president Tuesday morning. After his swearing-in, Obama delivered an inspirational address, encouraging American unity and service -- prompting daughter Sasha to give him the universal sign of approval!

To relive the most memorable moments of the inauguration, click here

The incoming president was more than happy to talk about politics -- but "Extra" host Mario Lopez wanted to get personal with Obama! From Michelle's pet name to a list of his favorite things, Obama dished all to "Extra"!

America's First family-elect jetted off to a Hawaiian getaway -- complete with sun, sand and golf!

Barack practiced his swing while wife Michelle relaxed on the beach with daughters Sasha, 7, and Malia, 10. The Obamas vacationed in high style at a $9-million home on Kailua Bay -- and between the beach and the driving range, the future Commander-in-Chief didn't appear to get much rest!

"It's really good just to work out stress, to make sure that you get in the gym every day," Barack told "Extra" in October of staying in shape. "I usually get up about six and I get my workout in -- that way I know that whatever else happens during the day, I've started the morning well."