Stars Come Out to Celebrate Jimmy Choo's Launch of "The Season," and More Party Pics

Samantha Barks joined Thandie Newton (in Stella McCartney) at a dinner Newton co-hosted in London with Jimmy Choo in honor of its pre-fall accessories collection, The Season.

Colbie Caillat kicked off Memorial Day Weekend with Old Navy at its Camp Old Navy event at River Park Pier 63 in New York City. "I’m happy to be here in New York on this beautiful day!" Caillat told InStyle.com before she made her way to the stage to perform before the crowd, who enjoyed traditional summer treats like lemonade, brisket, and s'mores. "I love the whole set up," she continued. "I always love these shows that are right on the water. It's always my favorite place to be around, especially to get to perform near."

Gisele Bundchen celebrated the launch of her campaign for BLK DNM with photographer Johan Lindeberg, who shot the supermodel free of makeup for the ads.

The four-man wolfpack came together in London to premiere the final installment of the epic Hangover trilogy. The film opens nationwide May 23.

Coco Rocha and Zac Posen enjoyed a night of art at the opening of the Revolution exhibition at the 69th Regiment Armory in New York City.

Elizabeth Banks and Sarah Chalke attended Versace and Vanity Fair's luncheon benefiting Vital Voices Global Partnership, an organization that aims to bring visibility to extraordinary women around the world by fostering their leadership potential.

Solange Knowles (in Diane von Furstenberg) energized the crowd at Intermix's 20th anniversary party, held at the New Museum in New York City. The singer performed a five-song set while party-goers sipped on Cucumber Fizz and Lemongrass Zest Belvedere-infused cocktails and Pampelonne Rosé Lime.

Now You See Me co-stars Jesse Eisenberg (in Calvin Klein) and Isla Fisher (in L'Wren Scott) partied at the Hudson Hotel in New York City to honor their new film about magicians. "I had to learn a lot of magic because my character is the best slight of hand magician in the world," Eisenberg told us at the premiere. "So I learned enough to make it appear that I had a lot of experience." The film opens nationwide May 31.

The House of Cards team, including executive producer Dana Brunetti, star and executive producer Kevin Spacey, and star Robin Wright, reunited at the 17th Annual Webby Awards, held at Cipriani Wall Street in New York City to accept their Special Achievement Award for their groundbreaking work on the Netflix's web-only series. The annual ceremony honors the best on the web.

Emma Stone and brother Spencer showed their love for mom Krista, a breast cancer survivor, at the 2013 Peace, Love & A Cure Benefit hosted by the Triple Negative Breast Cancer Foundation in Cresskill, New Jersey. During the event, Emma presented her mom with an award for her work in bringing awareness to the disease.

Kate Hudson (in Smythe) celebrated the start of the summer season with Gwyneth Paltrow (in Prabal Gurung) at a Goop bash held at the Mark's Club in London.

Brittany Snow (in Bionda Castana) and Trina Turk kicked off the start of summer at the 2013 Chandon Summer Soiree at the Dream Downtown in New York City. Turk collaborated with Chandon to create warm weather staples inspired by their new navy and white summer bottle. "We wanted to do a stripe that complemented the stripe on the bottle, so we did a multi red, white, and blue stripe," Turke told InStyle.com. "It's very cute!"

Rachel Roy attended the Modern Museum of Art's Party in the Garden soiree to honor New York City's Mayor Michael Bloomberg for his generous support of the museum. Guests were treated to a live performance by the band Fun.

Aziz Ansari, Amanda Seyfried (in Preen), and Chris O'Dowd premiered their movie, Epic, along with the rest of the cast in New York City. The film is a magical, animated tale of a teenage girl who finds herself transported to a deep forest where she teams up with others to save the world from evil.

The wolfpack is back! Bradley Cooper premiered The Hangover Part III in Los Angeles with the rest of the cast, including Ed Helms, Zach Galifianakis, Jamie Chung, and Heather Graham. The third installment opens nationwide Thursday, May 23.

Dianna Agron (in Valentino), Zosia Mamet, and Alexa Chung participated in Glamour Magazine's "These Girls" event to benefit the Urban Arts Partnership at Joe's Pub in New York City. The actresses performed personal monologues about their experiences being young women in today's society.

The East

co-stars Alexander Skarsgard and Ellen Page were on hand to premiere their new film at the Sunshine Landmark in New York City. The movie follows an anarchist group that is infiltrated by an operative from a private intelligence firm.

Kate Beckinsale and Chelsea Handler enjoyed a set by the Rolling Stones at the band's 50 & Counting tour stop at the Staples Center in Los Angeles.

Madonna (in Givenchy), who took home the award for Top Touring Artist, posed backstage with Celine Dion at the 2013 Billboard Music Awards.

Carly Rae Jepsen (in Dyanthe) caught up with Nashville star Hayden Panettiere (in Halston Heritage) on the red carpet before heading into the MGM Grand Garden Arena to accept her award for Top Digital Songs Artist at the 2013 Billboard Music Awards.

Taylor Swift (in Zuhair Murad), who took home eight trophies at the 2013 Billboard Music Awards, shared a moment with BFF Selena Gomez (in Zuhair Murad) during the show.

Georgetown Cupcakes owners Sophie LaMontagne and Katherine Kallinis joined Jessica Alba (in Miss Wu) at her book signing for The Honest Life: Living Naturally and True to You at the Redwood Restaurant in Bethesda, Maryland. The baking duo provided on-theme cupcakes for the event.

Lena Dunham (in Thakoon) and Judd Apatow showed their support for local Brooklyn hospital Lutheran Healthcare at its 130th Annual Dinner Dance at Pier Sixty at Chelsea Piers in New York City.

On-screen and off-screen couple Ginnifer Goodwin and Josh Dallas attended the Disney Media Network's International Upfronts to promote their show Once Upon a Time in Burbank, California.