What the stars wore this week: With Taylor Swift, Jennifer Lopez and Alexa Chung

We've rounded up 20 of the best celebrity outfits from the past week, including Alexa Chung's pretty Emilia Wickstead dress and Taylor Swift's all-preppy Cynthia Steffe outfit.

  • Fearne Cotton, 15 August

    Fearne Cotton's making the rainy weather work for her in this super cool mac outside the BBC studios in London. Cute mustard shoes too.

  • Alexa Chung, 14 August

    The British fashion icon wears a soft pink Emilia Wickstead dress and sharp Bionda Castana tie-up heels to launch her Nails Inc. collaboration at Debenhams in London on Thursday. Top marks for the mock neck.

  • Jessica Alba, 14 August

    The actress cuts a very Gwen Stefani-esque figure in this awesome get-up at LAX Airport.

  • Taylor Swift, 14 August

    Taylor Swift goes for a triple dose of preppy in this Peter Pan collar Cynthia Steffe dress, Oxford lace-ups and dusky pink Prada tote in New York.

  • Rosamund Pike, 14 August

    Rosamund Pike inducing serious shoe envy outside the BBC studios in London. We assume the monochrome outfit co-ordinating with the pavement is a happy accident.

  • Kate Mara, 14 August

    Black studs and super skinnies. Good one, Kate Mara. She'sat a Television Academy party in Los Angeles.

  • Sofia Vergara, 14 August

    It's mini and floor-length but Sofia Vergara is getting everything right in Andrew Gn at the Hollywood Foreign Press Association Installation Dinner in Los Angeles.

  • Elle Fanning, 14 August

    Elle Fanning dons a Vivienne Westwood corset dress for the dinner.

  • Olga Kurylenko, 13 August

    Olga Kurylenko, your diamantes are dazzling us. She's in Michael van der Ham.

  • Jenna Coleman, 14 August

    Jenna Coleman shows of a gorgeous Dior dress at BBC America's Doctor Who premiere in New York.

  • Emmy Rossum, 13 August

    Clashing prints and mustard stilettos, well done Emmy Rossum - she's out and about in Los Angeles.

  • Jessie J, 13 August

    Cute collarless coat Jessie J. She's mathcing her lips to her tote outside the BBC studios in London.

  • Rachel Brosnahan, 13 August

    We're very keen on Beautiful Creatures star Rachel Brosnahan's monochrome romper, on a shoot in New York.

  • Jemima Rooper, 12 August

    We're big fans of Jemima Rooper and her floaty floral dress at the What If premiere in London.

  • Ella Eyre, 12 August

    Ella Eyre, proving you can't go wrong with a white shirt, also at the What If premiere.

  • Lizzie Caplan, 12 August

    Lizzie Caplan's so cool. The fedora, the navy moccasins, the multiple bags. We want everything.

  • Jennifer Lopez, 11 August

    Jennifer Lopez gets the week off to a fine start in Los Angeles in this '70s inspired navy blue outfit - a loose blouse teamed with L’Agence shorts - and low-key Chanel accessories.

  • Katie Holmes, 11 August

    It's an old Hollywood-style Zac Posen pleated chiffon number with killer cape detail for Katie Holmes at the New York premiere of The Giver.

  • Odeya Rush, 11 August

    Also at The Giver premiere, Odeya Rush makes a big impact in a sweeping scarlet Georges Hobeika gown.

  • Meryl Streep and Louisa Gummer, 11 August

    The best-dressed mother and daughter in Hollywood, probably. They're also at The Giver event.