Power Dressing

Office essentials: I never leave home without my iPhone; an overflowing Hermès Birkin bag; Lanvin's daring accessories; and a spare pair of snakeskin stilettos to transform trousers and blouses into looks that are evening appropriate.

Style principles: Sophia Loren once said, "Beauty is how you feel inside, and it reflects in your eyes." Truly memorable style depends so much more on how you carry yourself and how you feel than it does on the exact components of your outfit. Still, a killer pair of heels never hurts.

Jacket, $2,295, Jean Paul Gaultier; neimanmarcus.com for stores. White top, $85, Kain Label; net-a-porter.com. Pants, $1,990, The Row; therow.com. Bracelet, price upon request, Pomellato; pomellato.com. Shoes, earrings & ring, Winston Wolkoff's own.

Sweater, $1,375, Brunello Cucinelli; (312) 266-6000. Cuff, $1,050, Hermès; (800) 441-4488. Earrings, Winston Wolkoff's own.

New York-based correspondent, Entertainment Tonight and The Insider

Office essentials: The perfect cocktail dress for the red carpet; simple black pants to dress up or down; and tons of jewelry —my wardrobe rack is colorful but simple, and jewelry glams up my look.

Style principles: My daily look depends on where I'm going and who I'm talking to. For example, when I interviewed Martha Stewart, I wore a conservative cocktail dress; for Oprah, high-waisted black pants and a blazer. I dress to impress, but I don't want to distract.

Top, $5,100, Dior; (800) 929-DIOR. Pants, $195, Helmut Lang; (212) 242-3240.

Dress, $4,500, Bottega Veneta; (212) 371-5511. Beaded bracelet, $1,990, Elisa Solomon Jewelry; elisasolomon.com. Gold bangles, $500 & $650, Helen Ficalora; (877) 754-2676. Necklaces, from top: $220, Dana Rebecca Designs, danarebeccadesigns.com; $940, $1,630 & $1,620, Elisa Solomon Jewelry, elisasolomon.com; $245, Iosselliani, honeyintherough.com.

Vice president, Media & Artist Relations, Island Def Jam Music (Justin Bieber is among her clients)

Office essentials: Sky-high heels, blazers, and jeans.

Style principles: My day's schedule—whether it's at the office, on the red carpet, or at a photo or video shoot—dictates how I'm dressed. If it's going to be a long day on set, I tend to be casual-chic. But if I'm going to be on the red carpet, I wear heels, because I'm vertically challenged. In the immortal words of Coco Chanel, "A girl should be two things: classy and fabulous." Feeling fabulous is always a confidence booster.

Orange top, $595, Yigal Azrouël; saksfifthavenue.com. Blue top, $78, Ralph Lauren Blue Label; ralphlauren.com. Skirt, $735, Stella McCartney; (212) 255-1556. Watch, $2,550, Hermès; hermes.com for stores. Earrings & ring, Victor's own.

Jacket, $1,895, Donna Karan New York; nordstrom.com for stores. Top, $78, Ralph Lauren Blue Label; ralphlauren.com. Bracelet, $3,790, Bottega Veneta; (212) 371-5511. Ring, Victor's own.

Aesthetic plastic surgeon, clinical assistant professor of surgery at Weill Cornell Medical Center, New York City

Office essentials: Comfortable, stylish shoes—Manolo Blahnik flats, Roger Vivier and Prada for high heels; cashmere tops; Hermès scarves worn in unexpected ways; great skin and hair.

Style principles: I favor chic, minimal, timeless fashion without sacrificing comfort or ignoring the latest trends. My overall vision as an aesthetic surgeon and beauty expert informs my style—the goal is to look effortlessly graceful, subtle, and polished, regardless of age.

Jacket, $2,900, Dior; (800) 929-DIOR. Necklace, $450, Assad Mounser; assadmounser.com. Watch, price upon request, Dior Timepieces; (866) 675-2048. Ring, Hirmand's own.

Jacket, $2,840, Fendi; (212) 759-4646. Top, $675, Calvin Klein Collection; (212) 292-9000. Pants, $195, Helmut Lang; (212) 242-3240. Necklace, $1,275, Annette Ferdinandsen at TenThousandThings; (212) 352-1333. Watch, $2,400, Hermès; hermes.com for stores. Bra, Hirmand's own.

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