It was a huge night in Hollywood at the world premiere of The Avengers, but not all of the stars were dressed to impress!

From the film’s superheroes, Scarlett Johansson and Robert Downey Jr., to reality stars like Katrina Smirnoff and Audrina Patridge, RadarOnline.com has photos of all the wardrobe winners and sinners in a special Red Carpet Glam feature!

It’s hard to believe that it has been more than a year since Kristen Stewart, Robert Pattinson, Taylor Lautner and the rest of the Twilight gang got all glammed up and hit the red carpet of the Los Angeles premiere of Eclipse – but on Monday night they were back in the City of Angels and sexier than ever for The Twilight Saga: Breaking Dawn Part 1 – and RadarOnline.com has all the style sinners and winners of the highly anticipated event!

PHOTOS: The Best, Worst & Wackiest Fashions At The Twilight Breaking Dawn Premiere

All the leading ladies were dressed to impress! While Kristen Stewart showed some leg in a slitty J. Mendel gown, Ashley Greene rocked a red hot Donna Karan strapless. Newlywed Nikki Reed finished off the terrifically dressed trio in a gorgeous, Grecian style mint green Marchesa gown.

Hollywood's hottest stars hit the orange carpet of the 2011 Nickelodeon Kids' Choice Awards on Saturday, dressed in the best, worst & wackiest fashions and ready to get slimed. RadarOnline.com has all the wardrobe winners and sinners in this special photo feature.

PHOTOS: The Best, Worst & Wackiest Fashions Of The Kids' Choice Awards

Miley Cyrus brought boho glamour to the fashion-packed awards show, wearing a gorgeous floral Dolce & Gabbana gown in a warm-toned color scheme.  The Hannah Montana star accessorized the luscious look with a long gold chain and crafty clutch, scoring herself the best look of the night.

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When it comes to Pretty Reckless fashion, Taylor Momsen always manages to push the envelope.  The former Gossip Girl looked more goth than gorgeous wearing scary-high black patent stilettos with black and white duds.

And leave it to will.i.am to up the wacky factor!  The Black Eyed Pea had a bad plaid attack, wearing a matching vest and blazer with a black v-neck, jeans, Christian Louboutin studded loafers and futuristic orange shades.

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Just like her hit show, Victoria Justice was Victorious on the orange carpet, wearing a sparkling multi-colored Theia mini dress with gold Brian Atwood 'Martina' pumps and carrying a matching Lauren Merkin 'Lucy' clutch, while Selena Gomez sizzled in a sexy Christian Cota mini dress.

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Jaden and Willow Smith dressed outside of the box as usual.  While Willow rocked gladiator sandals with a sparkling romper, her big bro went wild in tribal print tennis shoes and elaborately embellished jeans.

What were other stars, including Miranda Cosgrove, Steven Tyler and Kim Kardashian, wearing at the Kids Choice Awards?  Click here to find out.

From the red carpet to the streets, stars were out in full force this week wearing the best, worst & wackiest fashions and RadarOnline.com has all the photos in our weekly feature!

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

Has Justin Bieber been rubbing off on Selena Gomez? While her pop tart beau has proclaimed purple as his signature shade, the Disney darling has been rocking a lot of red as of late and we aren't complaining! Selena hit the Disney Kids and Family Upfronts in NYC, rocking a super sexy Dolce & Gabbana brocade mini dress, with gorgeous Brian Atwood Donna heels. Finished off with a glossy coat of red lipstick, the teenage dream scored herself the best look of the week.

PHOTOS: Bikinis! Disney Stars Stripped Down

Taylor Momsen grunged down into grotesquely goth getup for her Pretty Reckless show in suburban Virginia. Wearing lace thigh highs with a garter belt, lingerie-looking skirt, shredded tank and buckled Christian Louboutin boots, the former Gossip Girl wasn't exactly a vision of the average 17-year-old!

PHOTOS: Bikini Bad Girls!  Trouble Makers Strip Down

And Steven Tyler scored the wackiest look of the week slot by a landslide, hitting the PaleyFest event for American Idol dressed to shock.  The Aerosmith rocker was spotted in leopard jeans, a girly white blouse, a beige leather jacket, a long scarf and cowboy boots.

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Michelle Trachtenberg and Kelly Rutherford got all glammed up for 2011 School of American Ballet Winter Ball in NYC.  While Michelle looked marvelous in a lilac embroidered Marchesa gown, which she paired with a clutch from the same collection and David Yurman earrings, Kelly killed it in a one-shouldered embellished Robin Brouillette floorlength.

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Other best dressed babes included bride-to-be Reese Witherspoon who stepped out in Los Angeles with spring in her step, Alicia Silverstone, who showed off her massive baby bump in Rebecca Taylor maternity a la mode and Aldo heels, and Kristin Wiig, who ravished in ruffles in a flirty Stella McCartney gown at the Los Angeles premiere of Paul.

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Style sinners included Katie Holmes, Mary-Kate Olsen and Pharell, who all committed fashion fur pas, Christina Aguilera, whose Dolce & Gabbana red mini dress couldn't save her from a spray tan gone bad and Serena Williams, who had a catsuit catastrophe, while out to dinner with Kelly Rowland.

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See all the best, worst and wackiest fashions of the week, by clicking here.

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From the streets to the red carpet, stars were out in full, fashion force on Wednesday, dressed in the best and worst fashions—and RadarOnline.com has all the photos in our daily feature.

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

If purple is Justin Bieber’s trademark shade, then scarlet red is quickly becoming his galpal Selena Gomez’s!  The Disney star ravished on the red carpet at the Disney Kids and Family Upfronts in NYC, rocking a sexy Dolce & Gabbana mini with Brian Atwood Donna heels.  Later in the day, Selena hit MTV-7 looking sophisticatedly sexy in a Matthew Williamson bustier and Giuseppe Zanotti bowed heels with a form-fitting black suit.

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Paris Hilton committed a fashion fur pas in Los Angeles.  The gorgeous heiress wore a body-drenching floral frock with a fur-trimmed cardigan, snaky purse and hippie dippy headgear.

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Eva Green did not live up to her Bond Girl expectations at the NYC screening of Cracks, managing to make a skintight Tom Ford dress look frumpy.

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Kristen Bell, Wendie Malick and Leslie Mann all stepped out in charitably chic style to The Alzheimer’s Association’s 19th Annual A Night At Sardi’s in Beverly Hills, while Estee Lauder spokesmodels Joan Smalls, Hilary Rhoda, Constance Jablonski and Liu Wen brought their fabulous sense of fashion to the beauty brand’s Every Woman Can Be Beautiful celebration in NYC, unveiling their new Idealist Even Skintone Illuminator and Idealist Cooling Eye Illuminator.

PHOTOS: Bikini Bad Girls!  Trouble Makers Strip Down

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