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THE OBAMAS' FIRST DANCE
"It was so emotional," said Shakira of watching Barack and Michelle Obama dance to "At Last," sung by Beyoncé at the Neighborhood Ball. "It was something to tell my children about."

THE NEIGHBORHOOD

LEO'S CHALLENGE
At the night's first ball, Leonardo DiCaprio urged TV viewers to give back to their communities.

A HERO'S WELCOME
Before the Obamas took the stage, Mariah Carey dedicated her ballad "Hero" to the new President.

ON THE FIRST IPOD!
When she met Barack Obama, "he said he had my music in his iPod, but I don't know if he was just being nice!" said performer Shakira.

I DANCED WITH OBAMA!
Obama's most memorable move was his sassy hip bump with Victoria Lucas, 14. "I thought I'd see if he's got it going on," says the Delaware teen. So? "He was a very smooth dancer!"

Beyoncé Knowles'S SERENADE

"The Obamas inspire me to be better, to be smarter, to do more," said Beyoncé (singing "At Last" for the Obamas).

JOINING FORCES
"I'm so happy, I could scream," Sheryl Crow (with a Marine at the Midwestern Ball) said Jan. 19.

THE PLAYLIST

DJ Cassidy (a.k.a. Cassidy Podell, 27) worked the turntables at the Mid-Atlantic Inaugural Ball and also provided this Motown-heavy soundtrack for the other nine official balls:

"Signed, Sealed, Delivered (I'm Yours)"
Stevie Wonder

"Ain't No Stoppin' Us Now"
McFadden & Whitehead

"Ain't No Mountain High Enough"
Marvin Gaye & Tammi Terrell

"I'm Coming Out"
Diana Ross

"Wanna Be Startin' Somethin'"
Michael Jackson

"Love Train"
The O'Jays

"Pride (In the Name of Love)"
U2

"We Are Family"
Sister Sledge

"(Your Love Keeps Lifting Me) Higher & Higher"
Jackie Wilson

JOE, MEET JENNIFER
Before she and Marc Anthony chatted with Vice-President Biden at the Mid-Atlantic Ball, Lopez told PEOPLE, "It's amazing to feel the world changing."

PROUD PARENTS
Courteney Cox Arquette and David Arquette brought daughter Coco, 4, to the Feeding America party.

SHE BROUGHT DAD
"I love the fact that millions of people were there today, bound by hope," said Anne Hathaway (with her father, Gerald, and Magic Johnson at the Creative Coalition party).

BONUS BASHES!

The 10 Inaugural balls couldn't contain all the exhausted but exhilarated VIPs in town, who packed the evening's unofficial galas. Tobey Maguire, Kanye West and Shakira mingled at the Feeding America and Recording Industry Association of America's party, where Rihanna sang. And at the Creative Coalition's gala, Kerry Washington hoped the festivities would never end. "Last night I danced until 4," she says. "We'll see how long I last!"

DANCING STARS
The Obamas (at the Commander-in-Chief Ball) twirled at 10 balls—each time to "At Last"—before winding up around 12:35 a.m.