>> What a week — from awards shows to launch parties, the opportunities for chic were nearly endless. Taylor Swift and Nicole Kidman each brought major fashion cred to Sunday evening's Academy of Country Music Awards; Swift in a white and gold J. Mendel column, and Kidman in a sheer-paneled L'Wren Scott cocktail dress. At the Asia premieres of Battleship, Brooklyn Decker continued her recent penchant for high style, wowing in an understated Stella McCartney in Tokyo, then in a black lace femme d'armes gown in South Korea.

Click through to see those styles and more — including looks from Kate Bosworth, Emma Stone, and Karlie Kloss — right here, in our best-of-the-week roundup.

At 64 years old, model Cheryl Tiegs is in better shape than some women a third of her age — and her common-sense approach to keeping her diet balanced makes staying in shape sound like a walk in the park.

Tiegs recently told Modelinia that her diet isn't restrictive so much as it is relative. "I'm really only strict about it for about two to 10 days each month," she said. "It's not about depriving yourself of the things you want, it's about portions and knowing what you're buying at the supermarket."

Tiegs also recommends making simple changes in order to get fit and stay that way. "Bite the bullet. Be a big girl," she says. "Avoid the sweets for ten days — your glass of wine is your dessert at dinner. And everyone should have an off day."

Still, it doesn't look like Tiegs has had an off day in the past three decades. Proof of that right here, in the slideshow.

>> Lana Del Rey just landed on the cover of the new issue of French Glamour — but you've probably already seen it, because it uses some of the same photos featured in the March edition of British Vogue.

Mario Testino took the original photos for Vogue, but if Glamour published the same shots, it's possible he gave the magazine permission to do so. It's not an uncommon practice — international editions of various magazines sometimes use photos that were originally taken for other magazines. As Fashionista pointed out in December, photos of Carey Mulligan that were originally used for her October 2010 cover of American Vogue were recycled twice last year — once for the November issue of French Elle, and again for the December issue of German Glamour.

Take a look at how British Vogue and French Glamour used Testino's photos differently in the gallery.

>> The Chanel couture show Karl Lagerfeld hosted on an airplane wasn't the end of his dalliance with aviation — his next project is designing luxury helicopters.

Lagerfeld will collaborate with helicopter maker AgustaWestland to revamp its line of VIP choppers. He'll start with redesigning the interior and exterior of the company's AW139, a twin-engine helicopter that can seat up to 15 people, but his work could extend to other commercial models. The company told WWD that it admires Lagerfeld's "creativity and sophisticated style" and will use his talents to "introduce a new, limited edition, customized solution" to its customers.

Take a look through the gallery to see what the AW139 looks like currently.

>> The just-revealed Nars Summer 2012 collection features nine new products in a mix of tawny and cool hues that are sure to look just as chic on the beach as on city streets.

There's an eyeshadow palette called Ramatuelle that features three soft neutrals (matte apricot, silver, and shimmery pale gold), while an eyeshadow duo, Marie-Galante, is a dramatic combination of sparkling violet and inky, iridescent blue. Blush comes in the form of a burnished peach called Liberté, and the two new colors for lips are each bold and deep: Vendanges is a juicy grape, while Moscow is a matte red hue. "I was interested in exploring the interplay of earth tones and shimmers," creative director François Nars explained. "I think at first glance, the combination of orchid, blue, strawberry red, and seashell pink can sound and appear quite delicate and innocent, but our version of these colors and the way we combine them results in a look that's more fun and edgy."

The entire collection will be available April 15 at Narscosmetics.com —  until then, preview it all right here.

>> Marc Jacobs will debut a little sister to his fragrances Daisy and Lola this summer when he launches Dot, a new scent that Jacobs says has a "juicy, lush quality to it."

The fragrance combines berries, coconut water, jasmine, orange blossom, and vanilla, among other notes, to create what is described as a spirited and charming scent. The playful feeling the fragrance evokes is mimicked by the bottle — a red orb covered in black dots adorned with black plastic disks that look like butterflies.

"A dot is timeless and a pattern I always love, and round shapes are always beautiful," Jacobs told WWD. "I liked the idea of these hybrid butterfly-ladybugs, which suggest a sort of free spirit and femininity and playfulness. And, of course, ladybugs mean good luck."

Dot will debut in over 3,300 stores in the United States and Great Britain in July, and a Juergen Teller-shot ad campaign starring model Codie Young will pop up in magazines in September. Bottles of the perfume range in price from $48 to $89, with body lotion selling for $45 and shower gel for $40.

Jacobs's other big beauty project will be a color cosmetics collaboration with Sephora, but that's still in the preliminary stage. "It was an inspiring first meeting, and that gets me excited — when their enthusiasm matches my own," Jacobs said of the upcoming cosmetics collection.