Mischa Barton slips into a silver Versace gown with chain straps at the Conde Nast Fashion Rocks Concert at NYC’s Radio City Music Hall on Thursday.

Chains certainly seem to be the hot fashion accessory of the moment as Jessica Alba wore chains on her dress as well!

Earlier in the day, the former O.C. actress sparkled in a gold and yellow sequined dress at the Save the Children’s 75th anniversary event in New York.

20+ pictures inside of Mischa looking quite metallic… More Here! »

Mischa Barton poses backstage at the Miss Sixty Spring 2008 Fashion Show at Bryant Park during the NY Fashion Week on Thursday.

On Tuesday, the former O.C. actress decked out in Roberto Cavalli at “Une Journee A Paris” hosted by Van Cleef & Arpels in New York City.

15+ pictures inside of Mischa at Miss Sixty…

WHAT DO YOU THINK of Mischa Barton’s fashion week outfits? More Here! »

Mischa Barton walks her pet pooches Charlie and Ziggy while out and about in New York’s SoHo neighborhood accompanied by a few gal pals on Sunday.

The 21-year-old starlet wore a very bold white top with ruffled fuchsia sleeves and cut-off jeans. She finished off her look with sandals, a gold chain necklace and the Chloe Heloise Bag. Where are her maracas???

15+ pictures inside of Mischa all ruffled up… More Here! »

Mischa Barton attends the Mercedes Benz Polo event in Bridgehampton.

In October, Mischa will be starring in Virgin Territory, opposite Hayden Christensen.

Currently, Mischa is filming ‘Assassination of a High School President‘ and will be co-starring with Bruce Willis. “At a Catholic high school, the popular girl (Barton) teams up with a sophomore newspaper reporter to investigate a case of stolen SAT exams. Once the duo target their suspects, a larger conspiracy is unearthed.”

If you can remember back in 1999 Bruce and Mischa worked together in The Sixth Sense.

Nicole Richie shows off her full house in a low-cut black top while hanging out with actress pal Mischa Barton (in See by Chloe) around NYC’s SoHo neighborhood on Monday afternoon.

The four-months-along Richie also wore a black pair of skinny jeans and a pair of silver peep-toe snakeskin slingbacks by Christian Louboutin.

15+ pictures inside of Nicole and Mischa stylin’ in SoHo… More Here! »

Mischa Barton grabs lunch with friends at art-world hangout restaurant Sant Ambroeus in NYC’s West Village on Tuesday.

On her table was a copy of Mark Mathabane’s “Kaffir Boy: An Autobiography –The True Story of a Black Youth’s Coming of Age in Apartheid South Africa”. The book brings to light how the young black children dealt with racism and stereotypes.

Mischa, 21, is in town filming Assassination of a High School President with Bruce Willis in New Jersey. The former O.C. star currently lives in Hoboken, New Jersey.

“Every time I’ve come recently I’ve stayed in a hotel, which just feels lame,” said Mischa, who grew up in a NYC apartment. “I’ve been hanging at friends’ flats in the city, and it made me want to get a place of my own.”

She added, “I think I need to be back here. I’m in my twenties now, and it would be nice to finally have my own place in the city. I like the East Village, Greenwich Village, and the meatpacking. I’m sort of a downtown girl.”

Ashley Tisdale goes green in Juicy Couture dress in delicate floral lace at the 2007 ABC All-Star Party in Beverly Hills on Thursday. The High School Musical actress finished off her look with a Juicy pair of matching bow-trimmed sandals and Louis Vuitton Monogram Multicolore Ursula handbag in black.

Mischa Barton wore the same Juicy dress as she strolled NYC’s Soho last month. The former O.C. star finished off her look with a mesh fedora hat, Grecian-style sandals and a Chanel handbag.

Who wore it best — ASHLEY TISDALE or MISCHA BARTON?

Mischa Barton stepped out in a green Juicy Couture floral lace dress with flared cuffs on Thursday while shopping in New York City before promoting Keds at Lord & Taylor. She finished off her look with a mesh fedora and Grecian-style sandals.

The former O.C. actress wore the same Juicy dress in delicate white lace early last month while grabbing lunch with friends at Pastis restaurant in New York City. Mischa completed her look with the Gucci Indy Handbag and gladiator sandals with leather straps, rhinestones and gold studded details.

Which dress is best — GREEN MISCHA or WHITE MISCHA?