InStyle and Warner Bros. Golden Globes After-Party

Emma Stone

posed with InStyle Managing Editor Ariel Foxman among the sea of celebs gathered at the underwater-themed Warner Brothers/InStyle Golden Globes after-party held at the Beverly Hilton. Leonardo DiCaprio, Charlize Theron and new mom Tina Fey were among the revelers, the last marveling at the rare late night out with Amy Poehler and Will Arnett. "We're all parents. We agreed, 'We're having something to eat, and we’re all going home!" Sofia Vergara simply hoped to make her son's night memorable: "He wants to take a picture with Brad Pitt and Angelina Jolie-are they here?" But she didn’t let potential star-sightings get in the way of challenging Ty Burrell to a dance-off to Usher's "DJ Got Us Fallin' In Love." It was that kind of night!

- Andrea Simpson and Lindzi Scharf

Jessica Alba

traded her stunning Gucci red-carpet gown for a glittering strapless mini from the label. "Everyone decided that it was an awesome idea to step on my train," she joked of her last-minute switch-up. "I was like, 'Oh wait, I live up the street. I'm going to change out of that one.'" Super-stylist Rachel Zoe stood by in a flowing dress from her spring collection.

Fellow nominees Charlize Theron (in Dior Couture) and Viola Davis (in Emilio Pucci) chatted at the bash, Davis giving props to the night's Best Lead Actress in a Drama winner Meryl Streep: "I knew that it would happen for her and it couldn't have happened to a better human being."

Liv Tyler

and Kate Beckinsale (in Roberto Cavalli) caught up in an environment as beautiful as they are. Thomas Ford of Tom Ford Designs created a sexy, waterworld vibe by constructing a tent over the Beverly Hills Hotel fountain. The night featured a palette of dark teal, navy, silver, and coral colors. A 20-foot long, 11 foot-high interactive LED light sculpture transmitted a custom commissioned water-themed art installation video. Thousands of small monitors projected one large, moving, and life-like image.

The gorgeous cast of The Help had a mini-reunion in celebration of Octavia Spencer's win. "I consider this to be the award that I share with my cast and crew, you know?" the modest actress told us.

"I just want to hang with my friends and let loose," said Kim Kardashian, in Bruce Oldfield. "I came with [jeweler] Lorraine Schwartz and friends. It's a fun night of fashion for me."

Glee

love! Castmates Lea Michele (in Marchesa) and Cory Monteith (in Armani) took a break from rehearsals to party hop.

When she wasn't cutting a rug with her Modern Family costars, Sofia Vergara (in Vera Wang) was getting festive with pals like Sean Combs. She found the right party companion! "I'm here to create an exciting moment," Combs told us on the red carpet.

Heidi Klum

and Erin Wasson represented the modeling world-and made chef Giada DeLaurentiis, who created an Italian- inspired menu, very happy: "Heidi Klum cleaned every morsel of food off of her plate. She's a supermodel. I thought, 'This is the best night ever!'" Between bites of spinach ricotta ravioli, Klum (in Calvin Klein Collection) worked the room. "I scored some great guest judges for 'Project Runway' tonight. [Even on my night off], I'm hustling."

Emily

and Zooey Deschanel showed some sisterly togetherness at the fete.

Pals Tina Fey (in Oscar de la Renta) and Amy Poehler celebrated with Will Arnett and Maya Rudolph, but Fey had eyes for a star outside of her comedy circle. "[Angelina Jolie] looked like a space waitress, it was amazing," she told us. "She's the world's most beautiful space waitress."

Miss Golden Globes 2012 Rainey Qualley (in Alberto Makali) and Andie MacDowell (in David Meister) relaxed after a high-profile evening. Mother's advice to daughter? "Just to pay attention to where she is and to take the moment in."

Felicity Jones

smiled for the cameras in a '60s-inspired Valentino gown, while Shailene Woodley opted for her second dress of the evening. "This is a Stella McCartney, a super comfortable dress and I'm wearing my favorite flats ever," she told us of her sartorial switch. "Who knows how many times I'll be able to change into two different long dresses in one night-so why not?"

Jaime King

accented her Valentino couture gown with a Van Cleef & Arpels diamond necklace in her hair. "I saw this and I just felt like it was so elegant and so beautiful, so chic," she said of the dress. "I love anything with a really high neck. I just like the elegance of a more Old Hollywood look."

Lauren Conrad

selected a minidress from her own Paper Crown collection, but that didn't mean she was spoiled for choice: "Honestly, because I ended up going to this at the last minute, it was one of the only samples I could get!"

Happy Endings

star Elisha Cuthbert chose a feather-accented navy gown.

Malin Akerman

channeled a '20s flapper in an Etro minidress and Jimmy Choo heels. Of the cheerful color combo, she said: "I just felt like, I’m going to do a little bit lighter this time."

A relieved Jessica Chastain was holding on tight to one of her Harry Winston earrings at the after-party, saying with a happy sigh-"This just fell off about five minutes ago and I almost had a heart attack!" Her vintage gown came courtesy of Givenchy: "It was love at first sight, me and this dress."

Leonardo DiCaprio

was fully dapper for his party appearance. "I've got the bow tie on," he was overheard saying to a friend.

Having changed out of her awards show gown, a be-suited Evan Rachel Wood was spotted dancing into the party to the beat of Michael Jackson's "Rock with You."

Jodie Foster

made the scene in a regal corset gown from Giorgio Armani.

A down-to-earth Chris Colfer joked about getting prepped for the Globes: "I was eating spaghetti, watching The Real Housewives of Atlanta. He then slipped into a Calvin Klein Collection suit."

Once Upon a Time

star Jennifer Morrison was bewitched by her Victoria Beckham dress. "I adore her stuff," she said. "I would wear it every day if I could. She's got an incredible eye and she knows how to make a lady feel like a lady."

"I'm obsessed with navy blue and black," Emma Roberts said of her attraction to her Zac Posen gown. "It was navy blue and black and long, so I just thought I would try and rock the cut out right now." The sleek silhouette did not impede her plans to hit the Godiva chocolate room: "I'm going to have as many pieces as possible."

Glee

star Dianna Agron was drawing all eyes in her laser-cut Giles Deacon dress. "It's very bold," she said. "But it's just fun when you're blond to wear red." Thankfully, she had time to enjoy the party: "My call is a lot later tomorrow, so I might stay and kick up my heels a little bit."

Modern Family

's Jesse Tyler Ferguson was joined at the soiree by boyfriend Justin Mikita.