Hollywood's 10 Best Dressed of 2015 (and the Looks That Prove It)

In our increasingly image-driven era, ruling the red carpet is not as simple as it used to be. For the first time ever, InStyle has named its 50 best dressed of the year, with these 10 leading way. See November's InStyle to see the full feature by fashion director Eric Wilson, and log on our site to make your own list. http://bit.ly/1GHa83O
  1. 1.
    Rihanna in Giambattista Valli
    Minutes before the red carpet ended, the singer arrived to the Grammys in a show-stopping pink cupcake gown by Giambattista Valli. "She wears couture like a T-shirt," the designer tells us. She more of her best looks here. (http://bit.ly/1LklgWh) Photo Credit: Steve Granitz/WireImage
  2. 2.
    Julianne Moore In Giorgio Armani Privé
    Her awards season sweep went beyond collecting trophies, as Moore triumphed in gown after gown. She chose a plunging black Giorgio Armani Privé gown with feathers and beads for the 68th Cannes Film Festival. See more of her best looks here. (http://bit.ly/1LtQ7Df) Photo Credit: Nicolas Briquet/ABACAPRESS.COM
  3. 3.
    Emma Stone in Lanvin
    "If anyone could pull off wearing pants to the Golden Globes, it's Emma," says her stylist Petra Flannery, who considers this custom Lanvin jumpsuit a risk that paid off. "Everything from the hand-beaded bodice to the taffeta bow sash was perfect." See more of her best looks here. (http://bit.ly/1VRRXVs) Photo Credit: Tammie Arroyo-GG/AFF-USA.COM
  4. 4.
    Blake Lively in Monique Lhuillier
    At the premiere of Age of Adaline, Lively wore a gown with a fitted lace bodice, voluminous tulle skirt, and flowing train. With this choice, she also revealed her encyclopedic fashion memory, asking for the dress from a three-year-old collection. See more of her best looks here. (http://bit.ly/1Mqxrkr) Photo Credit: Jamie McCarthy/Getty Images
  5. 5.
    Jennifer Lopez in Valentino Haute Couture
    At the 69th Annual Tony Awards, Lopez brought her star power to Broadway's biggest night in this strapless navy gown with gold sequined detailing. See more of her best looks here. (http://bit.ly/1Pt3YLW) Photo Credit: Dimitrios Kambouris/Getty Images
  6. 6.
    Taylor Swift In Elie Saab
    For the 2015 Grammys, Swift chose a turquoise Elie Saab that featured a short skirt under the ball gown. She accessorized with Lorraine Schwartz jewelry and Guiseppe Zanotti shoes. See more of her best looks here. (http://bit.ly/1G5nzzV) Photo Credit: Jason Merritt/Getty Images
  7. 7.
    Cate Blanchett In Giorgio Armani Privé
    Blanchett suited up for the Giorgio Armani 40th Anniversary Silos Opening in sleek ivory Giorgio Armani Privé suit separates with a black obi-inspired tie belt at the waist, complete with black pumps. See more of her best looks here. (http://bit.ly/1GH8bVa) Photo Credit: Getty Images Europe
  8. 8.
    Lupita Nyong'o In Gucci
    At Cannes, the actress opted for a custom pleated chiffon gown with hand-painted floral crystals along the waist and plunging neckline. See more of her best looks here. (http://bit.ly/1VSsjKJ) Photo Credit: FilmMagic
  9. 9.
    Emma Watson In Ralph Lauren Collection
    Though Watson is no stranger to vivid color, her minimalist style tends to favor a strong and assertive palette of black and white. To wit: Watson attended the Duke of Cambridge's Royal Marsden dinner at Windsor Castle in England wearing an elegant white and gray ensemble paired with a Roger Vivier Boîte de Nuit clutch. See more of her best looks here. (http://bit.ly/1G5ohgA) Photo Credit: Chris Jackson/Getty Images
  10. 10.
    Keira Knightley in Delpozo
    The then-pregnant actress chose an embellished, flowing look from Delpozo's spring 2015 collection for the Critics' Choice Awards. See more of her best looks here. (http://bit.ly/1jz5VKm) Photo Credit: Steve Granitz/WireImage
  11. 11.
    See all 50 Best Dressed In Our November Issue
    InStyle's first-ever list of the 50 Best Dressed Women in Hollywood will be available on newsstands and for digital download Oct. 16. (http://apple.co/1HDxKJs)