The fiercest fashionistas and top models kicked off New York Fashion Week on Wednesday night, hitting the 2012 amfAR New York Gala at Cipriani Wall Street dressed to rock and shock in designer duds – and RadarOnline.com has all the wardrobe winners and sinners!

Famed fashion designer Roberto Cavalli was honored at the annual fundraiser, so it wasn’t shocking that several of the guests were decked out in gowns from his collection!

From inside the glam-packed tents of Mercedes-Benz Fashion Week to the hottest red carpet premieres, stars were dressed in the best, worst and wackiest fashion this week and RadarOnline.com has all the photos in our weekly feature.

Click Here To See The Best, Worst & Wackiest Fashions Of The Week

Diane Kruger always looks so fab in designer dresses, but has she ever looked this sexy?  The Unknown star hit the Los Angeles premiere of her latest flick, showing off her rock hard bod in an impossibly tiny Dolce & Gabbana lace mini, which was impeccably embellished in Swarovski crystals. She paired the 'price by request only' number with a pair of nude Brian Atwood heels for the best (and hottest!) look of the week.

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Vanessa Hudgens was impossible to miss this week.  The Beastly star took New York Fashion Week by storm, hitting nearly every Fall 2011 show in next season's fashions, and still had time to get inked in a tattoo parlor. Though some of her looks were luscious, the High School Musical grad experienced the biggest fashion flop of the week at courtesy of Anna Sui, hitting the designer's show dressed in a 1970's style pajama party ensemble.

PHOTOS: Vanessa Hudgens Is A Fashion Week Warrior

And leave it to Lady Gaga to up the wacky factor!  After her egg-celent entrance at the Grammy Awards on Sunday, she definitely woke up the country Thursday morning during a Good Morning America appearance, dressed up as a human condom.  Only the sassy singer would think to promote safe sex with such a creative costume!

PHOTOS: Bikini Wars! Sexy Songbirds Battle It Out On The Beach

And while Elisabetta Canalis steamed up the Sanremo Music Festival in a slew of gorgeous Roberto Cavalli gowns, the latest flock of Sports Illustrated Swimsuit Edition bikini babes strut their stuff in tiny dresses promoting the annual issue, which hit newsstands this week.

PHOTOS: Hollywood's Hottest Bodies In The Radar Bikini Awards!

Blake Lively continued her reign as NYC's It Girl, hanging out at the Marchesa presentation with the brand's designer Georgina Chapman, flawlessly rocking one of her fab frocks, while Leighton Meester was colorfully clad in one of Marc Jacobs' latest looks, at his celeb-packed show.

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Helena Bonham Carter brought her wacky style to Berlin, promoting The King's Speech in one of her offbeat looks and Pink brought her bizarre maternity fashion underneath the Santa Monica pier, wearing a colorful and crazy maxi dress.

PHOTOS: Celebs Strip Down Into Sexy String Bikinis!

Who else rocked and shocked on the fashion front this week?  Click here to find out.

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Stars had a busy Monday on the a la mode front, hitting the red carpet and the streets dressed in the best and worst fashions -- and RadarOnline.com has all the photos in our daily feature!

PHOTOS: The Best And Worst Dressed Stars Of The Day

Emily Blunt definitely brought out the bombshell for the New York premiere of The Adjustment Bureau! The gorgeous star hit the red carpet, looking fabulously fem in an intricately embroidered Eli Saab Haute Couture sleeved dress, which she paired with Brian Atwood heels.

PHOTOS: Bikini Wars! Sexy Stars Who Have Shared Lovers

Fergie was not looking her very best at Mercedes-Benz Fashion Week.  The Black Eyed Pea hit the Marc Jacobs show wearing a totally sassy MJ shortsuit, but then experienced a footwear faux pas by adding clunky black boots to her brightly hued and vividly patterned ensemble.

PHOTOS: The Best Booty’s On The Beach

Isla Fisher looked beautiful in blue, wearing a Temperley London mini to the Los Angeles premiere of Rango, where Abigail Breslin looked all grown up in a sensationally sequined mini and linen blazer ensemble.

PHOTOS: Celebrity Engagement Rings!

At the alice + olivia by Stacey Bendet presentation during Fashion Week, Kelly Bensimon showed off her hot Housewife bod in an embellished mini from the brand’s collection, while Kelly Rutherford rocked a Gossip-worthy flared leg pant look.

PHOTOS: Bikini Babes At Every Age

Who else rocked and shocked on the fashion front this Monday?  Click here to find out.

Out of all the sexy bikini babes on the beach, only a handful of hotties make it into the annual bikini bible of the world - the Sports Illustrated Swimsuit Edition. RadarOnline.com has compiled photos of all the steamiest stars, athletes and supermodels who have splashed the pages of the annual swimsuit magazine, showing off their flawless figures in skimpy swimsuits.

PHOTOS: Bikinis!  The Sexiest Sports Illustrated Swimsuit Edition Models

When Andy Roddick picked up the glossy Swimsuit Edition in 2007 and saw blonde bombshell Brooklyn Decker showing off her bikini bod in sexy style, he immediately called up his agent and requested an introduction - and we don't blame him! The All-American model, who married the tennis star in 2009, has been featured five separate times in the mag, with a cover inset in 2009 and her very own cover in 2010.