Last Season: Stars at Spring 2009 Fashion Week

Rachel Zoe and Kate Hudson

Stylist-to-the-stars Rachel Zoe (wearing a necklace by Van Cleef & Arpels) cozied up to client Kate Hudson (in a Chloe dress and Van Cleef & Arpels bracelet) at the launch party of her reality show, The Rachel Zoe Project. 30 Rock's Katrina Bowden, rapper Sean Paul and Project Runway winner Christian Siriano also joined in the festivities held at New York City's Gramercy Park Hotel.

-With reporting by Joe Berean, Polly Blitzer, Grace Lee, Betony Toht and Nakisha Williams

Justin Timberlake and Beyonce at Fashion Rocks

Dynamic duo Justin Timberlake and Beyonce lit up the stage of Radio City Music Hall when they channeled Marvin Gaye and Tammi Terrell for a performance of "Ain't Nothing Like the Real Thing" at the fifth annual Fashion Rocks concert in New York. The two also kept it down in Motown for earlier solo performances: Justin was as smooth and sexy as always, singing Gaye's "Got to Give It Up," and Beyonce tore down the house belting out "At Last" by Etta James (who was in the audience!) giving the crowd a preview of what's to come when she plays the iconic singer in the upcoming film Cadillac Records.

Miley Cyrus and Taylor Momsen

Taylor Momsen

turned heads and shocked audiences when she arrived in a punk-inspired look by BCBG Max Azria. "I live in my dark makeup…I wanted to do something different!" the Gossip Girl said of her look when she arrived with designer Azria. Later in the show, Momsen chatted with fellow presenter Miley Cyrus (in Zuhair Murad) backstage.

Lindsay Lohan and Samantha Ronson

It was a family affair at the Charlotte Ronson show with her sister, Samantha-who was accompanied by Lindsay Lohan-and mother, Ann Dexter Jones in the front row, while brother Mark Ronson worked the turntables. Lohan proudly sported a form-fitting denim dress from the '80s-inspired collection, and Samantha-wearing her trademark rocker-chic look-debuted darker locks.

Blake Lively and Becki Newton

Gossip Girl

star Blake Lively-who held court in the front row with Rosario Dawson (not shown) and Ugly Betty'sBecki Newton-watched as the splashy graphic designs wrapped around the catwalk at the Miss Sixty show. "I love Miss Sixty because I think they really know how to cut for a woman's body and they make great clothes," said the actress, who effortlessly sported a Miss Sixty jumper and Gemma Redux necklace.

Leighton Meester and Diane von Furstenberg

Leighton Meester

posed with Diane von Furstenberg at the legendary designer's runway show in Bryant Park. Meester was joined in the front row by fellow Gossip Girl star-and offscreen pal-Jessica Szohr.

Winona Ryder, Christina Ricci and Nicole Richie

Winona Ryder, Christina Ricci

and Nicole Richie applauded 20 years of DKNY at the line's runway presentation. "The show was great," said Richie. "All the looks were really amazing. There was a cute denim jacket that I can't wait to wear."

Jennifer Aniston and Courteney Cox

Friends

bffs Courteney Cox and Jennifer Aniston cuddled up at the Propr clothing launch at Sunwest Studios. The line is a collaboration between Ben Harper and David Arquette, who celebrated his 37th birthday at the fete.

Jessica Simpson and Anne Hathaway

Budding country star Jessica Simpson and Anne Hathaway made their NY Fashion Week debuts at the Marc Jacobs after-party, held at the Greenwich Hotel. Front-row regulars including Becki Newton, Kim Raver and Russell Simmons also showed to toast the designer.

Victoria Beckham and Jennifer Lopez

Talk about star power in the front row! Victoria Beckham and Jennifer Lopez add serious glam to the Marc Jacobs show held at the Armory in Manhattan. "He's such a genius, he really is," said the newly-pixied Beckham of Jacobs. "Definitely one of the most exciting designers there is."

Lindsay Price, Malin Akerman, Emmanuelle Chriqui and Perrey Reeves

The front row of the Luca Luca show was packed with Hollywood's young lovelies, including Lipstick Jungle star Lindsay Price, Malin Akerman, Emmanuelle Chriqui and Perrey Reeves. "I feel amazing in Luca Luca," said Chriqui. "It's so comfortable, sophisticated and cool at the same time."

Nicole Richie and Kanye West

Nicole Richie

posed with the ever-stylish rapper Kanye West at the Marc Jacobs show. West later joined Jay-Z behind the turntables at the after-party held at Greenwich Hotel, while Richie moved on to snap pictures of friends and the Brooklyn Bridge at House of Boucheron's 150th Anniversary party on the South Street Seaport.

Jessica Alba and Claire Danes

Civic-minded Jessica Alba took a break from political campaigning to show off her post-baby body at the NarciscoRodriguez presentation. Claire Danes and Juliana Margulies (not shown) joined the new mom in the front row.

Leighton Meester and Emmy Rossum

Fashion Week It Girl Leighton Meester sparkled alongside Emmy Rossum for the 3.1 Phillip Lim show carrying a Jada Loveless turquoise alligator clutch. Busy Meester also attended the 40th Anniversary of Calvin Klein party, along with presentations from Jason Wu and Diane von Furstenberg.

Heidi Klum and Michael Kors

Brand-new designer Heidi Klum and Michael Kors smiled proudly at the catwalk finale of Project Runway. Tim Gunn joined the duo as a stand-in for injured guest judge Jennifer Lopez.

John Legend and Diane Kruger

Singer John Legend and actress Diane Kruger were back-to-school ready at the Tommy Hilfiger show. Hottie producer Mark Ronson and sexy model Bar Rafaeli were also spotted hobnobbing with the designer.

Lauren Conrad

A triumphant Lauren Conrad took a bow at the culmination of her show on day three of Mercedes Benz Fashion Week at Smashbox Studios in L.A. The collection included adorable full-skirted mini-dresses and flowy maxi dresses-which Conrad called her favorite look from the collection.

Heidi Klum

This fashionable Project Runway judge raved about Christian Audigier while attending his show on day four of L.A. Fashion Week. "I love him! I think he's really talented-doing Ed Hardy, and doing Christian Audigier," said Klum, who wore a Giambattista Valli top and Erin Fetherston skirt.

Amy Smart

Green fashion has been a theme throughout L.A. Fashion Week. Amy Smart sat front row to support earth-friendly line Viridis Luxe on day three, wearing a dress from the line.

Natalie Portman

Natalie Portman

lit up the front row at the Giambattista Valli fashion show in Paris. Last year, the stylish actress made red-carpet appearances in chic designs by Rodarte and Lanvin.

Zoe Kravitz

Zoe Kravitz

, actress and daughter of rocker Lenny Kravitz and Lisa Bonet, struck a pose in Chanel at the label's 2009 Spring/Summer fashion show.

Dita von Teese, Katy Perry and Emma Watson

The fashionista pack gathered in Paris to see John Galliano's latest collection for Christian Dior. Dita von Teese joined Katy Perry and Emma Watson in the front row of the Spring 2009 presentation.

Marc Anthony and Jennifer Lopez

Jet-setting couple Marc Anthony and Jennifer Lopez (both in Dolce & Gabbana) rode in style to the 50th-birthday celebration of Domenico Dolce in Milan, Italy. Their horse-drawn carriage pulled up to the Hotel Principe's Club Prive where the A-list crowd was later serenaded by Diana Ross.

Rihanna

Ever-daring Rihanna commanded the front row at the Spring 2009 Gucci show. The Barbadian singer donned a minidress from the line along with daring fringed boots from the Fall 2008 collection.

Cate Blanchett

Superstar Cate Blanchett showed off her svelte shape in Armani Prive at the Giorgio Armani show in Milan. The mom of the three wasn't solo in the front row-Blanchett was joined by her husband, playwright Andrew Upton (not pictured), and one of her young sons.

Stella McCartney and Kate Hudson

Designer Stella McCartney and Kate Hudson (in Stella McCartney) attended a charity auction that included photographs of stylish British women like Kate Moss, Vivienne Westwood and Helen Mirren, taken by Stella's sister, Mary McCartney. The Natural History Museum-held gala, which was also attended by proud papa Paul McCartney, raised over $75,000 on behalf of Macmillan Cancer Support.

Elle Macpherson

Glamour girl Elle Macpherson strutted her stuff at the Mary McCartney exhibit hosted by 30 Days of Fashion and Beauty. The supermodel and lingerie designer took to the podium at the charity auction, to help raise money for cancer care.

Mischa Barton

Actress Mischa Barton was on the fringe at the Alice Temperley show in a minidress and bolero from the designer. "I love Alice because of her bohemian style," Barton told In Style U.K.. "She's just quintessentially London and I love that eclectic look." The British-born beauty also took in the Giles and the Vivienne Westwood catwalk shows.