From One Direction to Lady Gaga, Best and Worst Dressed of the Week (PHOTOS)

One Direction went high fashion, Rosie Huntington-Whiteley rocked a jumper, and Lady Gaga wore... bubble wrap? See fashion's highs and lows this week.

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Teen heartthrobs One Direction stepped up their fashion game with seriously mature style choices for the world premiere of their documentary, One Direction: This Is Us, in London. Harry Styles was a knockout in a heart-printed, black and white Burberry button-down, Zayn Malik channeled Kanye West circa—well, all the time—in a Lee Roach blazer, and Niall Horan was cool and casual in a Saint Laurent varsity jacket and pair of Nike kicks—his hair also paid homage to the frosted tips of '90s past.

Ian Gavan/Getty

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Actress Olivia Wilde stopped by Late Show With David Letterman to promote her new film, Drinking Buddies, in a white, semi-sheer Theyskens’ Theory dress from the designer’s resort 2014 collection. She accessorized with a thin gold bracelet and simple Christian Louboutin sandals.

Donna Ward/Getty

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At the Berlin premiere of The Mortal Instruments: City of Bones, actress Lily Collins wore a sophisticated, minimalist ensemble. A fan of crop tops, Collins wore a Paper London sleeveless, stomach-baring shirt with a full-length Halston Heritage Resort 2014 skirt. To spice up her all-black outfit, she accessorized with an edgy, chain-like Pluma Italia necklace.

Andreas Rentz/Getty

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Cate Blanchett has been on a serious fashion kick while promoting her new flick, Blue Jasmine. For the Sydney premiere, the actress wore a short-sleeve, full-length Roksanda Ilincic gown in a light orange hue.

Brendon Thorne/Getty

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Supermodel Rosie Hungtington-Whiteley rocked the hard-to-pull-off jumpsuit effortlessley. Huntington-Whiteley wore a black Gerard Darel long-sleeve silk jumper, with a blue Giorgio Armani bag and black ankle-strap Michael Kors sandals as she walked around London. Plus, her light tortoise Miu Miu sunglasses made a perfect summer accessory.

Keith Hewitt/FilmMagic

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Secret Life of the American Teenager star Francia Raisa looked like she was on her way to a high-school prom, in a very poorly selected cobalt-blue dress. Between the ponytail pouf, silver pump shoes, and the dress’s glitter detailing, the gown was way too Miss America pageant for the red carpet.

Jason Kempin/Getty

From One Direction to Lady Gaga, Best and Worst Dressed of the Week (PHOTOS)

One Direction went high fashion, Rosie Huntington-Whiteley rocked a jumper, and Lady Gaga wore... bubble wrap? See fashion's highs and lows.

Erin Cunningham