Hair's the Scoop

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Dianna Agron models a partial ponytail at the LA premiere of "I Am Number Four."

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Molly Sims models one of spring's hottest trends at the NY premiere of "Just Go With It."

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Rachel Bilson rocks rich, cocoa-colored eye makeup at the LA premiere of "Waiting for Forever."

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Modern elegance was David Babaii's inspiration for Nicole Kidman's SAG style. Below the celebrity stylist shares how he achieved the look:

"Starting with clean hair, I applied my new favorite must-have product called Couture Colour Pequi Oil Treatment to her entire head. It instantly absorbs and won't weigh hair down. Next, I blow dried Nicole's hair using the IT&Y HAIRFASHION Ionic Dryer.

After the hair was dried, I gently back combed the top and sides for volume and then smoothed the surface. To begin the up-do, I swept the hair gently over creating a faux side-part and brining the rest of the hair to the center back and securing with a band just at the top of the nape. I then wrapped the hair into an un-structured chignon and secured with bobby pins. The secret was not to over comb or smooth the hair but to allow the hair to create a soft natural look.

To finish, I used additional Pequi Oil to her bang area to define strands. And for added glamour, I added a subtle decorative clip to the side."

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Recreate Natalie Portman's SAG Awards beauty look with this step-by-step guide, courtesy of celebrity makeup artist Eileen Kastner-Delago:

"I first applied DiorCapture Totale High Definition Serum Foundation on Natalie to create a smooth, lustrous palette, then set the look with DiorSkin Wear-Extending Invisible Retouch Powder. I then illuminated Natalie's flawless face with Dior Skinflash in Sunbeam #003.

For Natalie's Old Hollywood-inspired eyes, I layered her lids and lower rims with Dior 5-Colour Eyeshadow in Stylish Move #970 and Sunset Cafe #440, then followed up with coats of Diorshow Mascara in Black.

Finally, to accentuate Natalie's lips, I applied Dior Addict High Shine Lipstick in Pink Protegee #664 and Dior Ultra-Gloss Reflect in Satin Peach #236."

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Recreate Amy Adams' slicked-back SAG Awards style with this step-by-step guide, courtesy of celebrity stylist Adir Abergel:

"The dress was a statement on its own, so I wanted to accentuate it; this look is a sleek statuesque 'do with a modern twist.

To start, I applied Fekkai Coiff Contrôle Ironless Straightening Balm from the roots to the end of the hair, then sprayed Fekkai Coiff Bouffant Lifting & Texturizing Spray Gel at the hair line to achieve the sleek finish.

Next, I blow-dried the hair straight with a round brush. With a straightening iron, I then sealed the ends to achieve the flat style. I pulled the hair into a high ponytail. (A great tip for this is to follow the cheek bone line all the way up, and then place the base of the ponytail at that point.) I then secured the hair with an elastic band, for an added dimension.

Finally for added shine, I finished the look by spraying Fekkai Advanced Brilliant Glossing Sheer Shine Mist allover."

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Julianna Margulies lights up the red carpet at the 2011 SAG Awards in LA.

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Artist Shirin Neshat pairs aggressive eyeliner with a petal-pink lip at the "Women Without Men" exhibit in Milan.

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Seeking look-at-me eyes, like Jamie Alexander's? Find your best fit in one of these hue-enhancing product collections:

Blue Eyes: CoverGirl Exact Eyelights Eye-Brightening 
Light-reflecting metallics and a hint of tint bring out your baby blues like no other. Our favorite combo: Mascara in Black Sapphire, Eyeshadow in Radiant Blues and Eyeliner in Radiant Saphire. ($6.99-$8.49, Drugstore.com.)

Green Eyes: Almay Intense I-Color 
Kate Hudson swears by this trio for green eyes: Mascara in Chocolate Quartz, Smoky Eye Kit in Green and Eyeliner in Rich Mocha. ($5.00 each, Walmart.com.)

Hazel Eyes: Smashbox Master Class Ultimate Eyes
Learn the tips and tricks for creating natural, smoky, and ultra-glam eye looks with this collection of customized shades for hazel eyes. Includes: Limitless Eye Liner in Plum, Eye Shadow Quad in Ultimate Eyes-Hazel, Hyperlash Mascara in Blackout, Artificial Light Luminizing Powder, Finish Lid Primer and Cream Eye Liner in Graphite. ($175 value for $59, Sephora.com.)

Brown Eyes: Physicians Formula Shimmer Strips Eye Enhancing 
Warm, copper tones enhance your rich, cocoa-colored peepers. Opt for Custom Eye Enhancing Shadow in Smoky Brown Eyes, Gel Creamliner in Glam Brown Eyes and Mascara Duo in Glam Brown Eyes, for best results.($10.95 each, PhysiciansFormula.com.)

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Heidi Klum rocks a playful updo at a friend's birthday celebration in London.