The Biebers, Megan Fox, Ciara & More Famous Faces Slay The Red Carpet At This Year's Met Gala — See Photos Of The Crazy Outfits!

Fashion's biggest night didn't disappoint! On September 13, nearly every celebrity under the sun attended the Met Gala in NYC. This year's theme was "In America: A Lexicon of Fashion," and of course, countless stars went completely over-the-top with their looks.

See highlights below!

The "Bad Guy" crooner, who was one of this year's cochairs, broke free from her usual baggy attire to wear a voluminous tulle gown.

"Thank you @oscardelarenta for designing this BEAUTIFUL dress and bringing my ideas and vision to life," she shared on social media. "It was an honor to wear this dress knowing that going forward oscar de la renta will be completely fur-free!!!!"

JLo's month of glamour continues! The triple threat wowed in an embellished brown Ralph Lauren dress, faux fur coat and bold accessories. While she walked the carpet solo, she later reunited with beau Ben Affleck.

The He's All That lead made an impression in a vintage corset dress and debuted a new blunt blonde hairstyle. It was the TikTok star's first time at the shindig.

The country singer's crop top and belted metallic skirt were both designed by Ralph Lauren.

Flower power! The Riverdale actress was in full bloom in her pale pink Christian Siriano gown. The piece was decorated with the official flower from every U.S. state.

For her first time at the bash, the "Brutal" crooner slipped on a feathered and lace catsuit, which she paired with dramatic silver earrings.

The Fenty Beauty founder was one of the last to arrive to the gala, but her entrance was worth the wait, as she glided down the carpet in an oversized black number alongside boyfriend A$AP Rocky.

The party marked RiRi and the rapper's first red carpet appearance together!

The actress revealed that her white frock took over 1,400 hours to design!

"This work of art changes with every step. It’s what this dress embodies," she explained. "For me, what’s needed in fashion and in life is change and evolution 🖤."

The lovebirds went for a toned down look, though the "Peaches" singer did play a part in designing his unique tuxedo.

Sheer delight! The model's crystal Givenchy Haute Couture gown paid tribute to an outfit Audrey Hepburn wore in My Fair Lady.

The actress' strappy Dundas piece was beaded by hand. "My first Met ✨thank you so much for having me," she wrote on Instagram.

The mom-of-three's beau, Machine Gun Kelly, wasn't able to attend as he was playing a concert in Central Park.

The "In My Blood" singer wore nothing but a leather blazer and velvet pants, while his señorita stunned in a vibrant feathery ensemble. Both outfits were Michael Kors.

Arriving later in the night, the reality star wore a Balenciaga design that covered literally every inch of her body. Her hair extensions measured in at 75 inches.

The man of the hour! As one of the cochairs for the night, the Call Me By Your Name star made sure to stand out in a white suit jacket, designer sweats and a pair of Converse.

"Big Boss inspired by THEE BOSS, Diana," the actress shared of her gold and black gown by Sergio Hudson.

The American Idol alum's gown took up a lot of space on the carpet. Inside, she took the layer off, and she revealed via Instagram that "sitting and talking with my girl @aliciakeys" was one of her "favorite moments" of the night.

Going for the gold! After the "Industry Baby" rapper made a grand entrance in a humongous cape, he took it off to unveil a golden suit of armor. He then stripped down once more to debut a gold bodysuit.

"Thank you @gucci @alessandro_michele for making my superhero fashion dreams come true 💕," the tennis superstar said of her colorful look, while her husband opted for a traditional tux.

Reigning supreme! The "Solar Power" songstress wore a funky two-piece, topping off her look with a spiky crown.

For her first time at the party, Madonna's daughter stepped into a magenta Moschino dress and proudly showed off her armpit hair.

The comedian, who acted as one of Vogue's red carpet reporters, stood tall in an earthy toned dress, complete with white feathery sleeves.

The Russian beauty walked the carpet with designer Jeremy Scott in his nude design that featured flowers and exposed boning.

The Vogue editor-in-chief took off her signature sunglasses to pose in a floral frock that featured a tiered hem.

The King of Staten Island star wore a Thom Browne dress and white blazer for his first time at the event.

"I'm just excited to people watch," he said. "There's some interesting people here and that's why I'm wearing sunglasses so they can't see me staring."

Though the Jungle Cruise star's husband John Krasinski stayed home, she had a fun night in her starry embellished design, which was a homage to Ziegfeld Girl.

Oh my! The Olympian's encrusted gown weighed a whopping 88 pounds! She eventually took the dramatic piece off to show off her turtleneck jumpsuit.

Though she's been slaying the runways for New York Fashion Week, the model took some time to unwind and partied it up in a column Prada dress.

The actress — who got engaged to Danny Fujikawa just a day earlier — looked gorgeous in a baby pink two-piece by Michael Kors.

The mother-of-three paid tribute to her NFL star husband Russell Wilson with her sequined lime green dress.

"My Hubby’s color rush Seahawks jersey transformed into a dress + His Super Bowl XLVIII ring = EVERYTHING!" she explained via Instagram. "Thanks for having me @voguemagazine at the #MetGala: American Fashion Event. This was truly a night to remember!"

The actress, who's receiving rave reviews for her portrayal of Princess Diana in Spencer, opted for a frilly Chanel blouse and white tuxedo pants.