From big screen bombshells to music’s sexiest singers, stars hit the red carpet and the streets this week in the best, worst & wackiest fashions---and we aren’t just talking about Halloween costumes!  See all the sizzling and fizzling photos in RadarOnline.com’s weekly wardrobe feature.

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

Rosario Dawson was Unstoppable at the Los Angeles premiere of her latest flick, scoring herself the best look of the week!  The big screen bombshell opted for a slate blue Stella McCartney gown, which Naomi Watts wore in fuchsia to the MET Costume Gala in May, showing off her long and lean legs via the sexy and dramatic side slit.

PHOTOS: Who Wore It Best? Naomi Watts Vs. Rosario Dawson

Though the Pretty Reckless jokes are getting old when it comes to Taylor Momsen, the 17-year-old actress-turned-singer was asking for Gossip when she hit the red carpet of the Tokidoki x Onitsuka Tiger Sneaker launch party in Hollywood on Tuesday. Little Jenny Humphrey looked like a cross between Courtney Love and Marilyn Manson, showing off her bra and panties underneath a lace romper and painting her face in truly goth style.

PHOTOS: Taylor Momsen And Other Stars Who Are Too Sexy, Too Young

Speaking of Love, the sassy singer looked like she crawled out of a Hole, wearing a wrinkled gown to an amfAR event in Hollywood.  Not exactly what we consider dressing to impress!  See her wacky wardrobe here.

PHOTOS: Bikini Wars!  Sexy Stars Who Heat Up The Beach In Halloween Colors

Reese Witherspoon flawlessly fulfilled her duties as an Avon lady!  The southern belle stepped out to the beauty brand’s 10th Annual Avon Foundation For Women Gala in NYC, looking sweet as honey in a tres fem front-ruffled Jason Wu ensemble.

See Reese’s charitably chic look here.

PHOTOS: Bikinis!  Horror Hotties Strip Down

Also looking ladylike and lovely were Eva Mendes and Jessica Biel, who both made their directorial debuts at the Glamour Reel Moments event in Hollywood on Tuesday night. While Jess rocked a lacy and racy sheer Oscar de la Renta frock, Eva opted for a Mad Men-style Lela Rose embroidered strapless dress.

PHOTOS: Bikinis! Hollywood’s Sexiest Singles Strip Down

Paris Hilton stepped out in Los Angeles like it was the Haight-Ashbury in the 1960’s.  The usually blinged out heiress was dressed in hippy dippy threads, carrying her costume-clad pooches around like were designer handbags.

Don’t miss Paris’ fashion flop.  See it here.

PHOTOS: The Best Booty’s On The Beach

And Rihanna also experienced a fashion flop, stepping out in a look that no other Girl in the World would ever attempt to pull off!

From the glitzy red carpet to the city streets, find out who else rocked and shocked on the fashion front this week in RadarOnline.com’s weekly feature.

From the glam red carpet of the Emmy Awards to the streets of suburban Detroit, there was no lack of sizzling and fizzling fashion this week, and RadarOnline.com has the photos to prove it!

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

Kate Gosselin was the most talked about star at the Emmy Awards, debuting a startlingly glam look, which had us panting for air. The mother of eight left the kids at home and was gowned in a dazzling Carmen Marc Valvo creation.  Talk about a glam-formation!

Steven Tyler shocked the suburban town of Birmingham, Michigan, leaving his posh hotel in a truly wacky wardrobe.  The Aerosmith frontman who was in town for a concert, paired his embroidered bell-bottom jeans, striped top and black vest getup with brightly hued socks and Tevas.  Rock ‘n’ roll?  We think not!

PHOTOS: Best Dressed At The Emmy Awards

Ali Larter adorably flaunted her baby bump in lilac beaded Marchesa tunic to the Resident Evil: Afterlife 3D premiere in Tokyo, while Whitney Port brought her BohoChic City style to Los Angeles, in a floral Blu Moon maxidress.

PHOTOS: Worst & Wackiest Wardrobes At The Emmy Awards

Kelis’ milkshake wasn’t bringing any boys to the bar this week.  The sassy rapper committed not one, but two fashion faux pas!

What other sinners and winners popped up on our Radar this week?  Check out our weekly feature, and find out.