Best Dressed of the Week: Zoe Saldana Stuns in Valentino

Plus, must-see looks from Chanel Iman and others.

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Zoe Saldana - The mommy-to-be radiates on the red carpet for the U.K. premiere of her new film, Guardians of the Galaxy, in a printed Valentino gown. The flowing fabric drapes effortlessly over her growing baby bump. By Jazmine A. Ortiz(Photo: Tim P. Whitby/Getty Images)

Elle Varner - The singer slips into a sleek LBD and matching peep-toe sandals for her appearance at The Knick screening in New York City.(Photo: J. Countess/Getty Images)

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Elle Varner - The singer slips into a sleek LBD and matching peep-toe sandals for her appearance at The Knick screening in New York City.(Photo: J. Countess/Getty Images)

Photo: J. Countess/Getty Images

Selena Gomez - This It Girl brings sexy back in a beautifully draped gown with a thigh-high slit at the Leonardo DiCaprio Foundation Launch in Saint-Tropez, France.(Photo: Dominique Charriau/French Select/Getty Images)

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Selena Gomez - This It Girl brings sexy back in a beautifully draped gown with a thigh-high slit at the Leonardo DiCaprio Foundation Launch in Saint-Tropez, France.(Photo: Dominique Charriau/French Select/Getty Images)

Chanel Iman - The model attends the "MARILYN: The Lost Photos of a Hollywood Star" opening night exhibit in NYC wearing a slinky orange number.(Photo: Andrew Toth/Getty Images)

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Chanel Iman - The model attends the "MARILYN: The Lost Photos of a Hollywood Star" opening night exhibit in NYC wearing a slinky orange number.(Photo: Andrew Toth/Getty Images)

Photo: Andrew Toth/Getty Images

Angela Simmons - This fashionista never fails to amaze us! Angie hits the streets in thigh-high boots, denim cut-offs and a long Slit Kai top from Shop Crave Boutique.(Photo: Angela Simmons via Instagram)

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Angela Simmons - This fashionista never fails to amaze us! Angie hits the streets in thigh-high boots, denim cut-offs and a long Slit Kai top from Shop Crave Boutique.(Photo: Angela Simmons via Instagram)

Irina Shayk - The Sports Illustrated swimsuit model dons a white long-sleeved Azzedine Alaïa dress to a taping of Extra in California. The simple design flares into a full skater skirt with a scalloped hem. And let's not forget those strappy sandals!(Photo: RHS/WENN.com)

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Irina Shayk - The Sports Illustrated swimsuit model dons a white long-sleeved Azzedine Alaïa dress to a taping of Extra in California. The simple design flares into a full skater skirt with a scalloped hem. And let's not forget those strappy sandals!(Photo: RHS/WENN.com)

Photo: RHS/WENN.com

Beyoncé - Want to get Bey's look? The "Flawless" singer poses on Instagram in a fuschia Matthew Williamson stretch crepe jumpsuit and navy Manolo Blahnik “BB Shimmer Patent 105” pumps.  (Photo: Beyoncé via Instagram)

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Beyoncé - Want to get Bey's look? The "Flawless" singer poses on Instagram in a fuschia Matthew Williamson stretch crepe jumpsuit and navy Manolo Blahnik “BB Shimmer Patent 105” pumps. (Photo: Beyoncé via Instagram)

Photo: Beyonc? via Instagram

Adrienne Bailon - The petite star struts her stuff on the 'gram in a floral dress by Roberto Cavalli and nude Louboutin heels.(Photo: Adrienne Bailon via Instagram)

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Adrienne Bailon - The petite star struts her stuff on the 'gram in a floral dress by Roberto Cavalli and nude Louboutin heels.(Photo: Adrienne Bailon via Instagram)

Photo: Adrienne Bailon via Instagram

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Vivica A. Fox - The actress arrives at the Hercules L.A. premiere in an A-line Hervé Léger scoop-neck dress paired with studded suede Jimmy Choo platforms. (Photo: Valerie Macon/Getty Images)

Photo: Valerie Macon/Getty Images

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Chrissy Teigen - John Legend's wife co-hosts the Belgian National Day Celebration in New York City wearing a sheer black gown with colorful accents.(Photo: Rob Kim/Getty Images for Stella Artois)

Photo: Rob Kim/Getty Images for Stella Artois/ Rob Kim/Getty Images for Stella Artois