Just bust a move!
At the 14th Annual Warner Bros. and InStyle Golden Globes afterparty on Sunday, The Big Bang Theory star Kaley Cuoco was anything but shy on the dance floor.
After running over to Hayden Panettiere, the People's Choice Awards host looked the Nashville star up and down and exclaimed, "Gorgeous! Gorgeous!" about her blush, tiered strapless gown, an onlooker tells PEOPLE.
Grabbing each other's hands, Cuoco and Panettiere were engulfed in "animated conversation," but things got even more fun once the deejay played Madonna's "Like a Prayer."
Cecconi's in West Hollywood was the site of a celebrity date night as Audi kicked off Golden Globes week with a star-studded bash on Sunday.
Liev Schreiber and Naomi Watts arrived holding hands and spent the evening cozied up in one corner of the restaurant's covered patio, an onlooker tells PEOPLE.
With Schreiber sipping on a glass of red wine with one arm draped adoringly around the beaming Watts's waist, the duo couldn't look any more in love.
The couple later caught up with actress Kate Bosworth and her fiancé, director Michael Polish, with Schreiber only breaking away to cross the crowded room and greet a late-arriving, Connie Britton, who was resplendent in an off-the-shoulder floor-length red gown.
Who knew Neil Patrick Harris and Barney Stinson had so much in common?
The actor got in touch with his magical side (just like his How I Met Your Mother alter ego) at the Academy of Magical Arts's 50th anniversary celebration at the Magic Castle in Hollywood. Harris, who presides over the organization's board of directors, rushed back from vacation in Montana just to be in town for the festivities.
While toasting the organization, the actor mingled with other guests and magicians, including Siegfried Fischbacher of Siegfried & Roy, and talked about how much he loved magic as a kid, a source tells PEOPLE.
"He wanted to know the secrets that no one would share with him, so he became a magician himself," the source adds. Indeed; Harris joined AMA's junior academy as a child (he even had to audition!) and often performs at the Magic Castle. – Melody Chiu
Just call Christina Aguilera a Jingle Belle!
The Voice coach stepped out on Saturday with boyfriend Matthew Rutler for film and television producer Jennifer Klein's annual private holiday party in Los Angeles.
Arriving around 11:30 p.m. with a small group of friends, the duo "looked to be in the best of moods, sitting in a corner, happily sipping on Russian Standard Vodka Moscow mules while their friends sang and dance to Michael Jackson," an onlooker tells PEOPLE. "They seemed to be quite in love and happy!"
Other guests included Chris Evans and girlfriend Minka Kelly, who donned "giant smiles" as they stayed close throughout the evening.
Meanwhile, Mad Men's Christina Hendricks dressed for the holiday theme in a red plaid dress and enjoyed cocktails with her husband Geoffrey Arend and friends.
– Jennifer Garcia
New couple alert?
Rose Byrne and Boardwalk Empire's Bobby Cannavale clutched hands as they surreptitiously made their way through the crowd inside the Hall of Ocean Life at New York's American Museum of Natural History Monday night. Though the duo never posed for pictures together on the red carpet, they looked to be very much together and enjoying each other's company at a bash to celebrate IFC's hit comedy Portlandia's upcoming third season (Jan. 4, 10 p.m. ET). (When asked if they were dating, Byrne's rep had no comment.)
The soiree, which began with a screening of two upcoming episodes from the series and an introduction by its stars and writers, Fred Armisen and Carrie Brownstein, continued into the vast ocean-themed room, lined with hundreds of models of sea creatures and bathed purplish-blue lights as a 94 ft. long blue whale hung from the ceiling.
A who's who of the comedy world stars – Martin Short; David Cross and wife Amber Tamblyn; and most of the current cast of SNL – mingled in the large room, chatting with each other and with fans (there was no separate VIP section) and grabbing drinks from the large bar in the center of the room or nibbling passed Hors d'oeuvre such as bite-sized waffles with Camembert cheese.
It was an A-list party for the A-listers!
On Sunday night, Al Pacino, Christopher Walken, Alan Arkin and Julianna Margulies celebrated their new film Stand Up Guys at The Oak Room in New York's Plaza Hotel.
"Al Pacino chatted with Christopher Walken, Alan Arkin and director Fisher Stevens as they sipped on cocktails," an onlooker tells PEOPLE.
It was a star-studded affair as Ben Stiller, Liev Schreiber, Matt Dillion, Jeremy Piven, Mariska Hargitay, Jon Bon Jovi, Alan Cumming, Girls' Zosia Mamet and Boardwalk Empire's Bobby Cannavale were all also in attendance.
After the screening at the Museum of Modern Art ended, guests enjoyed Appleton Estate cocktails, small bites of lobster claw, salmon tartar, mushroom crostinis and shrimp cocktails.
– Melody Chiu
Martha goes Miami!
While in Miami for Art Basel, Martha Stewart attended Roger Dubuis's event for the Velvet Collection presented by Dom Perignon and Haute Living at Villa Azur on Wednesday.
"Martha arrived right before dinner was served and was chatting with Daphne [Guinness]," an onlooker tells PEOPLE.
"She was talking to her friends that she brought and seemed to be having a great time," the source adds. "She had a huge smile on her face. She looked really good!"
"Art Basel supposedly is Miami's largest revenue source bringing billions into the economy – the city looks amazing and vibrant," Stewart Tweeted earlier that day..
But the entertaining expert wasn't the only star on hand – Russell Simmons, Jonathan Cheban and Karolina Kurkova were also there to enjoy a 2003 Vintage Dom Perignon created by filmmaker David Lynch.
– Kevin O'Donnell
Cover girl Lucy Hale celebrated adorning NYLON's December/January issue at Andaz West Hollywood on Friday.
The evening – presented by bebe – kicked off with a private dinner at The Wine Gallery and then continued with a rooftop after party under the stars.
Young Hollywood was on hand to wish the Pretty Little Liars star well. Guests included Teen Wolf's Colton Haynes, Hale's PLL costar Tyler Blackburn, The Big Bang Theory's Johnny Galecki and Glee's Nolan Gerard Funk.
On Saturday, Westlake Village Inn Hotel in Westlake Village Calif., buzzed with excitement following Tiger Wood's 14th Annual World Challenge Golf Tournament.
Northern Ireland's Graeme McDowell took home top honors, winning his second World Challenge. But the real celebration was happening at Bogies, the hotel's lakeside bar and lounge, which held the closing party for the tournament.
At Bogies, Tiger Woods stepped out dressed in jeans and beige sweater.
"He was all smiles as he danced the night away," an onlooker tells PEOPLE. "At one point, he was surrounded by a group of six women on the club's dance floor."
The man of the hour, Woods requested songs alongside the deejay as the party went on.
– Jennifer Garcia
Following a Sunday night screening of Les Miserables, the cast and crew dined at Porter House New York.
Hugh Jackman, Anne Hathaway, Amanda Seyfried, Eddie Redmayne, Russell Crowe and Sacha Baron Cohen were all on hand to celebrate the film.
Anna Wintour, Michael Kors, Joan Collins and Tony Danza were also there to enjoy passed items from Chef Michael Lomonaco including roasted sliced filet mignon with cabernet and shallot sauce, porcini mushroom ravioli with white truffle cream and bite-sized desserts including New York state apple pie, cream puffs and mini ice cream sandwiches.
But the most delicious part of the evening was when Jackman – accompanied by a pianist – serenaded Seyfried with "Happy Birthday" while she stood on top of the grand piano bench in the center of the dining room.
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