From The Delevingne Sisters to Rihanna, The Best & Worst Dressed of the Week (PHOTOS)

Rosie Huntington-Whiteley’s bandeau, Naomi Campbell’s Alaïa gown, and Ciara’s too-Kanye-for-comfort ensemble. See this week’s fashion highs and lows.

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For Dior’s Autumn 2013/Winter 2014 show in Moscow this week, the street-style star looked fetching in a black dress with colorful stripes from the designer’s Resort 2014 collection.

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Those wacky Delevingne sisters gussied up for a reception hosted by Charles, the Prince of Wales, in honor of saving the Asian elephant from extinction. Even better than their strange headpieces, Cara yukked it up with Camila in a series of great photos.

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Munn showed some skin in a nightie-inspired Thakoon frock and ear cuff at the premiere of Season 2 of The Newsroom on July 10.

Chris Pizzello/Invision/AP

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The 26-year-old model looked stunning in a simple white Calvin Klein bandeau and skirt at a dinner for ModelCo in Australia.

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Blake Lively looked tanned and beachy in a Burberry dress and Lorraine Schwartz jewels at the Turbo premiere in New York on Tuesday.

Stephen Lovekin/Getty

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Campbell looked statuesque in a black tiered Alaïa dress at the Novak Djokovic Foundation gala in London earlier this week.

Ben A. Pruchnie/Getty

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Rihanna looked pretty badass in a pleated Balmain dress, Manolo Blahnik satin boots, and a Christian Dior necklace as she stormed the stage at the Monte Carlo Sporting Summer Festival in Monaco as part of her Diamonds World Tour.

Lionel Cironneau/AP

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The actress looked prim and proper in a Pre-Fall 2013 Stella McCartney black and white structured A-line dress and Christian Louboutin heels.

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Model (and Bradley Cooper girlfriend) Suki Waterhouse looked like she forgot to set her alarm, running down the streets of Manhattan in an oversize button-down, cargo shorts, and sneakers.

Felipe Ramales/PacificCoastNews

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Unfortunately for Ciara, Kanye West is the only person who can pull off (and get away with) a wildly printed Givenchy top, a long black skirt, and crazy oversize kicks. The singer promoted her new namesake album, Ciara, at J&R Music World in New York on Tuesday in the over-the-top ensemble.

Shareif Ziyadat/Getty

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Amanda Bynes channels her inner Smurf as she arrives for her appearance at the Manhattan criminal court in a bright blue-green wig. Her court-appropriate attire consists of a loose black tank, sweatpants, and sneakers.

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Fergie looked a bit disheveled, layering a printed kimono over a black T and leggings. The colorful combo with her bed-head-styled hair and a bright Birkin made for messy Malibu attire.

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From The Delevingne Sisters to Rihanna, The Best & Worst Dressed of the Week (PHOTOS)

Rosie Huntington-Whiteley’s bandeau, Naomi Campbell’s Alaïa gown, and Ciara’s too-Kanye-for-comfort ensemble. See this week’s fashion highs and lows.

Isabel Wilkinson