When the biggest names in Hollywood, music, and fashion get together, there are bound to be some friendly matchups, and that's just what happened at 2013's Costume Institute Benefit on Monday. Stars mingled with their famous friends, walked the carpet with their designing pals, and brought their significant others to celebrate the Punk: Chaos to Couture exhibit at the Metropolitan Museum of Art. Go ahead and check out the fun duos at the Met Gala, including Jennifer Lawrence's Hunger Games reunion with Elizabeth Banks and Nicole Richie's run-in with Julianne Hough and Jaime King.

Gisele Bündchen arrived in sky high heels on the arm of her husband, Tom Brady, to the Costume Institute Benefit in NYC on Monday night, but by the end of the evening it was Tom's job to carry her stilettos home. Gisele's black Anthony Vaccarello dress showed off some skin, and she threw up some hand signs to embrace the night's theme on the red carpet. Tom, on the other hand, went with a bright blue number fresh off his big Kentucky Derby win.

Gisele chose a daring look from designer Anthony Vaccarello for the event, which celebrated the Punk: Chaos to Couture exhibit at the Metropolitan Museum of Art. Throughout the night, Tom and Gisele stuck together — often with his hand planted right on her behind. Gisele and Tom are no strangers to the fashionable red carpet, having attended multiples times through the years, including while Gisele was pregnant with Vivian last year. Vivian may be a little young to participate in the ball, but she did get to celebrate at a party in the park with her older brother Benjamin on Saturday. On Saturday, Gisele, Ben, and Vivian met up with Tom and Jack for dinner at Blue Ribbon.

Kim Kardashian and Kanye West made a grand entrance to NYC's Metropolitan Museum of Art for last night's Costume Institute Benefit. Kim donned a floral Givenchy by Riccardo Tisci Met Gala gown to make her inaugural appearance, which was a highly-anticipated one since much attention has been directed towards her recent maternity wear. The couple, who are expecting their first child in July, attended the gala together for the first time, since Kanye was the live entertainment for the event. Although Kim was scrutinized for her covered-up look, Kanye came to her defense during his performance last night on stage adding a line into his song directed at Kim singing, "You're so awesome." His sentiments were reflected on the red carpet as well as Kim and Kanye shared many affectionate moments on their way into the fashionable affair. Click through to see them all!

The annual Costume Institute Benefit is all about fashion and fun, but before the stars can celebrate inside the bash, they have to make their way into the Metropolitan Museum of Art by way of the grand staircase. The dramatic carpeted steps make for gorgeous photos — and sometimes dress difficulties — as celebrities navigate the steps in their stylish gowns and getups. We've rounded up the most stunning staircase shots from this year's gala, starting with Kim Kardashian and Kanye West's moment on their way into the Met.

Anne Hathaway took the Costume Institute Benefit's punk theme to the next level and debuted a new dye job on the Metropolitan Museum of Art red carpet in NYC on Monday. She accented her platinum blond locks with a sexy vintage Valentino gown from 1992. Anne's not the only star to rock wild hair this evening — check out Miley Cyrus's spikey 'do and Nicole Richie's white locks! Make sure to vote on your favorites in our Met Gala fashion and beauty polls.

Jennifer Lawrence posed for the cameras as she made her way into the 2013 Met Gala in NYC on Monday. She chose a ladylike gown by Dior — not surprising since she's one of the faces of Miss Dior — for the event, which was extraspecial since it was her first time attending. Jennifer shared a moment with fellow face of Dior Marion Cotillard as well as Sarah Jessica Parker on the carpet. On her way in, Jennifer stopped to chat about the decision-making process, which she says is pretty easy when you have the designer of Dior Couture giving you direction. Jennifer isn't the only Met Gala rookie to secure an invite to tonight's bash, since Kim Kardashian is making her first appearance as well. She'll be attending with boyfriend Kanye West, who is expected to perform at the party.

There's so much Met Gala fashion and beauty to see — make sure to vote on your favorites!

Tom Sturridge and Sienna Miller got into the Costume Institute Benefit's punk theme as they hit the red carpet together at the Metropolitan Museum of Art in NYC on Monday night. Sienna covered up a white Burberry gown with a studded leather jacket by the same designer and even sported studs in her hair and on her ears. Tom, meanwhile, covered the safety-pin angle with pins holding together his shirt and adorning his hat. When she wasn't busy posing with her man, Sienna met up with model pal Cara Delevingne, who was also outfitted in Burberry. What do you think of their looks? Make sure to vote on your Met Gala fashion and beauty favorites!

Jennifer Lopez made a dramatic entrance to the 2013 Met Gala in a curve-hugging gown by Michael Kors and a punk-inspired pompadour tonight. She had the designer — and her boyfriend, Casper Smart — as her dates for the stylish evening, which brings out the biggest names in fashion and beyond. J Lo made the trip to NYC after spending the weekend in Florida, where she filmed the music video for "Live It Up" with Pitbull. Casper was with her on the sandy set as well and showed off his abs shirtless as he watched the action.

There's even more fun to come as the red carpet heats up, so make sure to vote on all of your favorite fashion moments so far!

Cameron Diaz brought a bold purple Stella McCartney look to the Met Gala red carpet in NYC tonight. She got dressed up for the annual fashion event after spending the afternoon filming The Other Woman with Leslie Mann. Leslie also attended this evening's festivities with the duo's other costar Kate Upton, who was in a gown by Diane von Furstenberg. They're just a few of the ladies on the red carpet at the Met Gala — be sure to check them all out and vote on your fashion and beauty favorites.

Gwen Stefani got into the Costume Institute Benefit's punk theme in a custom look by Maison Martin Margiela tonight. The No Doubt singer had her husband, Gavin Rossdale, on her arm for the festivities. Gwen's cutout creation was designed specifically for her to wear to the annual fashion event, which celebrates the Metropolitan Museum of Art's Punk: Chaos to Couture exhibit. Gwen got the stylish fun started on Saturday night, when she attended a special screening of The Great Gatsby alongside Katy Perry, Emma Roberts, Leonardo DiCaprio, and Carey Mulligan. Gwen may be back to mingling with Carey, Emma, and Katy tonight, since they are also on the list of Met Gala attendees — let us know whose look is your favorite in our Met Gala fashion and beauty polls!

Lena Dunham brought her A-game to celebrate the Met Gala's Punk: Chaos to Couture exhibit in NYC tonight. She wore a custom Erdem dress and shoes and was joined by designer Erdem Moralioglu for the fashionable evening. Lena's night out came during a break from filming for the third season of Girls. Her costar Allison Williams also got away from the cameras for the bash. The red carpet fashion and beauty is still coming, so make sure to vote on your favorite Met Gala looks!

Dakota Fanning walked the red carpet at the Costume Institute Benefit at the Metropolitan Museum of Art in NYC tonight with her sister, Elle, not far behind. They both wore designs by Rodarte for the occasion and shared their excitement at seeing friends and other famous faces throughout the evening — Elle told Vogue that she's most interested in seeing Beyoncé Knowles! Stars are still arriving, so make sure to check out all the fashion and beauty moments and vote for your favorites as the night goes on.

Katie Holmes was stunning in a backless white Calvin Klein Collection gown at the Costume Institute Benefit at the Metropolitan Museum of Art in NYC tonight. She was one of the first to arrive and stopped on the grand staircase on her way into the museum to pose with designer and Calvin Klein creative director Francisco Costa. Katie's no stranger to the annual fashion event, having attended in years past with husband Tom Cruise. There are so many more stars to see on the carpet this evening, so make sure to check out all the fashion and beauty favorites!

Kristen Bell and Dax Shepard ventured out of their LA home and headed to brunch with their newborn daughter, Lincoln, on Sunday. The trio's dining excursion marked the first time we've seen Kristen and Dax out with Lincoln following her birth on March 28. Dax admitted to only having left the house twice since then, when he stepped out to host a CASA of Los Angeles gala last week. Kristen will soon be the one in the hosting spotlight after it was announced that she'll return to the stage for the Country Music Television Awards in June. It'll be her second time heading up the show, though her cohost has yet to be revealed.

Jessica Simpson and Eric Johnson touched down at LAX with their daughter, Maxwell, yesterday. The trio returned from a quick trip out of town after taking off together from LA on Friday. Jessica is back home in time to gear up for the Friday finale of Fashion Star, which wraps up the series's second season. Two of Jessica's designers, Garrett Gerson and JesseRay Vasquez, were voted off last week, leaving Jessica with just one contestant, Hunter Bell, as they head into the final show. The fashion competition is wrapping up just in time for Jessica to move on to another big project, the birth of her second child. She celebrated the baby boy with a Tom Sawyer-themed shower last month — throw your own whimsical event with these Peter Pan shower ideas.

Jennifer Lopez hit the Fort Lauderdale, FL, set of her new music video for "Live It Up" with Pitbull yesterday. J Lo's boyfriend Casper Smart kept a close eye on the shoot, which included what looked like a kiss between J Lo and Pitbull. The duo didn't actually lock lips for the cameras, but they did get close dancing and singing. J Lo also filmed her own sexy moments in both a black string bikini and a nude one piece. Casper got into the fun, too, and went shirtless in the sand during the action, which, according to Casper's Twitter account, lasted 18 hours. Things got complicated though, when J Lo had to be rushed off the set after gunshots were fired nearby.

J Lo and Casper let loose on the beach for work after spending last weekend in Las Vegas partying. The couple celebrated Hakkasan Nightclub's grand opening at the MGM Grand. At the event, J Lo apparently chatted with Tiësto about possibly collaborating on a new track.

Gisele Bündchen spent Saturday afternoon at an NYC park with her kids, Benjamin and Vivian. The trio were attending a party, where Gisele chatted with other moms as Ben played in the grass and Vivian stayed snug in her stroller. Later that night, Gisele switched out of mom mode. She headed to the opening of Dolce & Gabbana's flagship boutique on Fifth Avenue in a sexy white lace dress to celebrate with designers Domenico Dolce and Stefano Gabbana. Yesterday, Gisele wrapped up the weekend with a family dinner, along with her husband, Tom, and stepson, Jack Brady, at Blue Ribbon. Tom joined the family in NYC after an exciting Saturday in Louisville. Tom attended the Kentucky Derby, where he celebrated the winning horse Orb's victory, leading to speculation that he may have won money by placing a bet on Orb.

Gisele is back on the East Coast after a trip to London for work last week. She got in front of the camera for her new H&M Fall campaign and even had a visit from Vivian on set. Gisele will be back in the spotlight tonight when she hits the red carpet for fashion's biggest event, the Met Gala.

Alanis Morissette hung out on the beach in Hawaii with her son, Ever, on Saturday. She sported a striped bikini top and black bottoms with "Self Love" jeweled on the back, which showed off her many tattoos. Alanis's husband Mario Treadway joined the duo on the beach yesterday, when he and Alanis got away for PDA in the water. Alanis took the tropical trip with her family to mark Mario's birthday, which was on Friday. They'll soon have another reason to celebrate since their third wedding anniversary is coming up on May 22. Alanis's time off comes after she partnered with Kiehl's last month to design a limited-edition label for the Kiehl's Ultra Facial Cream with the proceeds benefiting Recycle Across America. Zachary Quinto was also involved in the project, and the duo got together to attend an Earth Day event in honor of the April 20 release of the product.