Jennifer Lopez nailed theme dressing with a sheer gown covered in crystal spider webs.Jennifer Lopez attends the 2025 Sundance Film Festival. Neilson Barnard/Getty Images Lopez wore the Valdrin Sahiti piece for the premiere of her new film, "Kiss of the Spider Woman."Its black lace design had long sleeves, a mock neckline, and a slit in the back of its long skirt. She wore it with platform heels, a Tyler Ellis bag, and an updo hairstyle.The outfit was glamorous, fun, and one of the most memorable at the event.Sarah Jessica Parker mixed too many pieces of different styles.Sarah Jessica Parker attends the 2025 Sundance Film Festival. London Entertainment /Getty Images Parker attended numerous events at the Sundance Film Festival on Friday, and she did so in dramatic fashion.The "Sex and the City" star wore a blue button-up blouse beneath a ruffled gray dress, a chunky tan cardigan, and purple velvet boots. She also wore a black puffer coat when walking outside.Unfortunately, the outfit looked more messy than fashionable, and its outer pieces distracted from her fun dress and shoes.Benedict Cumberbatch kept things cool and casual with a three-piece outfit.Benedict Cumberbatch attends the 2025 Sundance Film Festival. Cindy Ord/Getty Images He was photographed at "The Thing About Feathers" premiere in a $2,200 corduroy top from Prada. He wore it with a black turtleneck, matching trousers, and shining dress shoes.The outfit was cool and cozy enough for a winter premiere in Utah while also being fashionable with a subtle designer touch.There were too many bold elements involved in Questlove's denim look.Questlove attends the 2025 Sundance Film Festival. Deadline/Getty Images The musician wore green cargo pants, a denim poncho from Greg Lauren, and $950 Marni clogs made with furry, long-haired calfskin.His shoes and top were unique and would have made great statement pieces if worn separately.When styled together, however, they made for an overwhelming combination.Alison Brie looked sharp in a suit and lace corset.Alison Brie attends the 2025 Sundance Film Festival. Neilson Barnard/Getty Images Her Alex Perry set included a black blazer with sharp shoulder pads and skinny ankle-length trousers. She wore them with a sheer, structured top from Giuseppe Di Morabito, which retails for $910.Her suit was perfectly tailored, and its professional look made for an interesting contrast to her daring corset top. Brie looked sharp, chic, and feminine.The denim pieces that Rachel Sennott wore didn't work together.Rachel Sennott attends the 2025 Sundance Film Festival. Deadline/Getty Images For a Deadline event, Sennott paired a sheer $670 Coperni top with light-wash jeans. In theory, the outfit should have been seamless.However, her long-sleeved blouse had denim cuffs, a collar, and pockets that were darker in color than her pants.The two garments looked mismatched, and her brown heels blended in too much with the carpet to add more depth to the look.A bold print and fluffed silhouette worked for Chlo Sevigny.Chlo Sevigny attends the 2025 Sundance Film Festival. Deadline/Getty Images She wore a white Vivienne Westwood set that included a button-up cardigan with a built-in necktie, a skirt with the same matching gray print, and a black undershirt.Its thick knit fabric was the perfect choice for a winter fashion moment, and its flowery print added a feminine flair.She wore the outfit with black leather boots.There were too many bold elements to Sara Bareilles' red-carpet look.Sara Bareilles attends the 2025 Sundance Film Festival. Neilson Barnard/Getty Images The main piece of the musician's eye-catching look was her $260 Farm Rio top. It had long, puffy sleeves, a high neckline, exaggerated shoulders, and an all-over multicolored print.The blouse would have looked stunning with jeans and her $275 suede, fringed boots from Sam Edelman.Instead, she wore both with a $298 skirt from Marie Oliver that was too stiff in silhouette and too bold in its blue color.Ayo Edebiri proved that green is her color.Ayo Edebiri attends the 2025 Sundance Film Festival. Isaiah Trickey/Getty Images She walked the carpet for the "Opus" premiere in a two-piece ensemble from The Row. It included a sleeveless knit dress beneath a poncho-style coat that wrapped around the actor's body.The outfit was simple and understated but still made a statement thanks to its shapeless design. Its olive color also perfectly suited Edebiri and her berry-colored makeup.