From Kim Kardashian to Lady Gaga, The Best and Worst Dressed of the Week

Rachel Zoes rocks Valentino, Emma Watson shows off sharp tailoring in Saint Laurent, and Lady Gaga channels her inner unicorn. Plus, more best and worst dressed of the week.

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For the Miami premiere of her upcoming animated film Rio 2 on March 21, Anne Hathaway chose a bright, bold purple-and-red Roksanda Illincic dress and lavender platform Charlotte Olympia heels.

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To celebrate the launch of her latest book, Living In Style: Inspiration and Advice for Everyday Glamour, at Tiffany & Co. in NYC on March 24, celebrity stylist and TV personality Rachel Zoe looked elegant in a black, multi-tiered lace and leather gown by Valentino.

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Emmy Rossum celebrated the launch of Christian Louboutin's 'Passage' handbag in Los Angeles on March 25, sporting a black, white, and blue sundress with bright blue pointed-toe snakeskin heels and a black leather "Khepira" clutch, both by the designer.

Donato Sardella/WireImage

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Spotted while out in Beverly Hills, Kim Kardashian donned a red Calvin Klein long-sleeve knit crop top and coordinating pencil skirt with Tom Ford sandals.

Clint Brewer/Splash News

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Emma Watson arrived at The Late Show with David Letterman in a perfectly tailored, menswear-inspired black suit and crisp white button-down by Saint Laurent. She accessorized with a Reese Hudson clutch, black Christian Louboutin slingback heels, and rings by Sabine G.

Ray Tamarra/WireImage

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Actress Zoey Deutch looked chic at the Sandro Paris event in L.A. on March 20 wearing a short-sleeved navy blue lace frock with a white Peter Pan collar by the designer.

Donato Sardella/WireImage

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Mindy Kaling looked chic in an emerald green jacquard pencil skirt and slight crop top from Topshop, black Christian Louboutin heels, and jewelry by Jennifer Meyer at Paleyfest 2014 on March 25 in Hollywood.

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Mother Monster stepped out in New York City on March 24 channeling her inner-unicorn. Gaga donned a bright pink, glittery suit and coordinating hat by London designer Christian Cowan-Sanluis, but her ultimate accessory was her flowing ponytail that closely resembled an animal tail.

NCP/Star Max

From Kim Kardashian to Lady Gaga, The Best and Worst Dressed of the Week

Rachel Zoes rocks Valentino, Emma Watson shows off sharp tailoring in Saint Laurent, and Lady Gaga channels her inner unicorn. Plus, more best and worst dressed of the week.

The Fashion Beast Team