President Barack Obama
History is made as Obama is sworn in as the 44th President of the United States.
Sean Combs
Diddy seems to be seeking silence as the inauguration gets underway in D.C.
Beyoncé & Jay-Z
The power couple, along with millions of their closest friends, witness the inauguration in the nation's capital.
Steven Spielberg & Kate Capshaw
The director and his actress wife listen intently as Obama delivers his inauguration speech.
Miley Cyrus
The teen pop star represents the 2012 reelection voters at the Kids' Inaugural: We Are the Future concert Monday night, televised on the Disney Channel (natch) from the Verizon Center in Washington D.C.
Jay-Z
The hip-hopster brings the house down (along with a little help from Beyoncé, not pictured) while performing in Washington, D.C., at the Eve of Change concert on the, well, eve of the inauguration.
Jonas Brothers
After performing at the Kids' Inaugural concert, Joe, Nick and Kevin celebrate the historic weekend with many of their fans' parents at the Huffington Post's Pre-Inaugural Ball at D.C.'s Newseum.
President-elect Barack Obama
The next leader of the nation spoke at the We Are One pre-inaugural concert before a memorial to another notable Illinois politician and president, Abraham Lincoln.
Jessica Alba & Jamie Foxx
Partying for the new Commander-In-Chief, Jessica and Jamie do their bit at the pre-inaugural Tropicana bash at the Renaissance Washington Hotel.
Shakira, Marc Anthony & Jennifer Lopez
This powerhouse trio lends their star wattage to the Latino Inaugural Gala celebrating change at Union Station in Washington, D.C.
Lindsay Lohan & Samantha Ronson
Setting aside, if not settling, any personal issues, LiLo and SamRo party for the cause at the A New Birth of Citizenship pre-inaugural bash presented by Declare Yourself in the Renaissance Washington Hotel's Grand Ballroom.
Garth Brooks
The country music king delivered a rocking version of "American Pie," not to mention a rousing bit of the party anthem "Shout" at the We Are One concert.
Ben Affleck
Hungry for change and eager to help those who are just plain hungry, the Oscar-winning actorvist attends the National Hunger Rally pre-inaugural event hosted by Feeding America at the Martin Luther King Library in Washington, D.C.
Bruce Springsteen
The Boss kicked off the weekend's We Are One event, performing a raspy "The Rising" with a soaring gospel choir.
Ashton Kutcher & Demi Moore
The A-List marrieds rise early to address a pre-inaugural breakfast promoting the Entertainment Industry Foundation and ServiceNation's "A New Era of Service" event at Ballou Senior High School in Washington, DC, the day before the inauguration.
Beyoncé
The singer known as Sasha Fierce delivered a stirring performance of "America the Beautiful" at the We Are One event.
Molly Sims
Since the soon-to-be first family has yet to decide on a family dog, this cute canine gets our vote as he strikes a patriotic pose with the actress at Pepsi's Pre-Inaugural Celebration in Hollywood.
Sheryl Crow & Will.i.am
The two Democratic Party boosters teamed up to perform Bob Marley's "One Love" in front of the Lincoln Monument the pre-inaugural We Are One event.
Kim Kardashian
Here's hoping the new president will look for ways to whack out hunger, like the reality-show star made an effort to do at Pepsi's Pre-Inaugural Celebration, which brought together celebs on behalf of Feeding America.
U2's Bono & the Edge
The band tore through "Pride (In the Name of Love)," their anthem dedicated to Dr. Martin Luther King.
Barack Obama, Michelle Obama, Sasha & Malia
The (soon-to-be) First Family enjoyed the moment, watching, laughing and taking pictures.
Mary J. Blige
When she sings "Lean on Me," you know she means it.
Jamie Foxx
The Oscar winner and funnyman was one of many notable celebs to speak at the celebrations.
Barack Obama, Marisa Tomei, Shakira, Bono & the Edge
First co-starring with Golden Globes winner Mickey Rourke and now hanging with the next leader of the free world? Tomei is doing all right for herself.