From the glam-packed red carpets of the Billboard Music Awards to the streets of NYC, stars were dressed to rock and shock this week in the best, worst and wackiest fashions and RadarOnline.com has all the photos.

PHOTOS: The Best, Worst & Wackiest Fashions Of The Week

Though Selena Gomez, Rihanna and Nicki Minaj sizzled up the Sin City scene at the Billboards, the most-talked about missy a la mode this week was her royal hotness Kate Middleton! The Duchess of Cambridge rocked a nude Reiss bandage mini to mingle with First Lady Michelle Obama at Buckingham Palace and guess what?  The sexy $340 dress was sold out by the end of the day!

PHOTOS: The Best, Worst & Wackiest Fashions Of The Billboard Awards

Fergie experienced a style-slip at the music awards, wearing an S&M style Herve Leger harness dress, while Mischa Barton had a palazzo pant catastrophe in London.

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As for wacky fashion, Lady Gaga celebrated the release of Born This Way, hitting the streets of NYC in one crazy look after another!

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Halle Berry delved into the cutout dress trend at the FiFi Awards in NYC, showing off her beyond-hot bod in Halston, while Katie Holmes modeled her own Holmes & Yang designs at the Drama Desk Awards.

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What other style winners and sinners made our haute list this week?  Click here to find out.

From inside the walls of Buckingham Palace to the streets of Italy, stars were dressed to rock and shock on Tuesday and RadarOnline.com has all the best and worst looks in our daily fashion feature.

PHOTOS: Stars In The Best & Worst Fashions Of The Day

Angelina Jolie looked red hot at the Los Angeles premiere of Tree of Life, wearing a one-sleeved Jenny Packham gown with Stuart Weitzman heels, while Michelle Obama stole the show at Buckingham Palace in a divine Tom Ford gown.

From the red carpet to the streets, Hollywood stars stepped out in the best, worst & wackiest fashions this week, and RadarOnline.com has all the photos in our weekly roundup.

PHOTOS: Stars In The Best, Worst & Wackiest Fashions Of The Week

Anna Paquin vamped up her look for the premiere of Scream 4, scoring herself the best look of the week in a belly-baring Cushnie Et Ochs sleeved dress, while Kirsten Dunst brought frump to the pump landing herself the worst dressed title. And leave it to Bai Ling to up the wacky factor, dressing to shock in an awkward frock.

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Other style scores included Angel Alessandra Ambrosio in Emilio Pucci, Kate Middleton in a sophisticated (and sexy) vintage Amanda Wakeley suit and Gwyneth Paltrow rocking a sensational spring Alexander Wang ensemble, while fashion offenders included Melanie Griffith, Khloe Kardashian and Kelis.

PHOTOS: Bikinis! Oscar Winners Stripped Down

Who else was dressed to rock and shock this week?  Click here to find out.

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From the star-studded red carpet premiere of Scream 4 to the city streets, stars were out and about on Monday dressed in the best & worst fashions and RadarOnline.com has all the photos in our daily feature.

PHOTOS: Stars In The Best & Worst Fashions Of The Day

Anna Paquin hit the Los Angeles premiere of the highly anticipated Wes Craven sequel in totally stellar style.  The True Blood hottie looked sexier than ever in a Cushnie Et Ochs sleeved dress, which consisted of two pieces held together by metal bars. Paired with metallic Brian Atwood Maniac heels, Anna scored herself the best look of the day.

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From the streets to the red carpet, stars were out and about on Monday dressed in the best and worst fashions. RadarOnline.com has all the photos in our daily feature‹where no celeb is immune to a fashion police arrest.

PHOTOS: Stars In The Best And Worst Fashions

Fresh from her Hawaiian vacation, Cameron Diaz radiated at the Los Angeles premiere of The Green Hornet. The blonde bombshell showed off her fab figure in a scarlet Azaaro number, which she paired with nude Casadei pumps and a delicate Lana Jewelry necklace.

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Hollywood celebs bounced out of vacation mode and headed back to work this week, stepping out in fab and faux pas fashions and RadarOnline.com has all the photos in our weekly feature. To see stars in the best, worst & wackiest fashions, click the next sentence.

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

After reports that she had split ways with her Thanksgiving-to-Christmas beau Jake Gyllenhaal, Taylor Swift rocked the red carpet of the People's Choice Awards in Los Angeles on Wednesday night, in fabulously fem fashion. The country cutie looked pretty in pink in a J. Mendel number from the Spring 2011 collection, which she paired with matching Prada heels and Neil Lane jewels. If she keeps looking this gorgeous, Tay Tay will surely find herself a new plus-one in time for the Grammy Awards in February.  See Taylor here.

PHOTOS: The Best, Worst & Wackiest Fashions Of The 2011 People's Choice Awards

Drew Barrymore missed the a la mode mark at the 50th Anniversary bash for CoverGirl. The brand's beautiful spokesperson looked great from the waist up in her marigold Jill Sander strapless gown from the Spring 2011 collection, but the cinched detail under her knees was unforgivable. See Drew's miss here.

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Little Red Riding Dame? The fabulous Helen Mirren had a not so fabulous fashion faux pas in Los Angeles, pulling a Britney Spears and baring her belly in a crop top. The 65-year-old star paired a loudly patterned skirt with red tights, shoes and sweatshirt, landing herself the worst look of the week.  See Helen here.

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Nicole Richie was dressed to thrill for a day at the salon in West Hollywood, rocking cutoff denim shorts with black tights, a white top, black jacket, a patterned scarf and a bright red Chanel flap bag, while Angel-turned-Transformer babe Rosie Huntington-Whiteley aced the less-is-more look, making a splash in St. Barts wearing a skimpy bikini.

See Nicole here and Rosie here.

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Britney Spears and Lisa Rinna sported some not-so-hot headwear, while running errands in Los Angeles, while Snooki embarrassed the Burberry brand, wearing their iconic plaid scarf, while promoting her latest book on Extra.

See Britney's blunder here, Lisa's here and Snooki's here.

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To see more rocking and shocking fashion in RadarOnline.com's weekly photo feature, click here.

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