From the swanky red carpets in NYC, Los Angeles and Miami to the streets of London, stars were dressed in the best and worst fashions on Thursday and RadarOnline.com has all the sizzling pics!

PHOTOS: Stars In The Best And Worst

Anne Hathaway hit the Opening Night Gala of the AFI Fest 2010 premiere of her latest flick Love and Other Drugs, dressed to impress in leading lady style. The brunette babe rocked a figure-flattering Antonio Berardi dress, which featured short sleeves and chic side panels, with nude Sergio Rossi peep-toes.

It is almost unbelievable that Iman is 55-years-old, because the stunning supermodel still looks runway ready! David Bowie’s wondrous wife glammed up the New York Stock Exchange to celebrate the 40th anniversary of Essence magazine, wearing a fire-engine red Victoria Beckham pencil dress from the Fall 2010 Collection. Belting the figure-flattering frock in gold and rocking black peep-toes on her feet, Iman scored the Best look of the day!

PHOTOS: Selma Blair, Iman, Amy Smart, Rihanna, Mary Carey, Stephanie Pratt, Jacinda Barrett, Stacey Alysson, Bridget Marquardt, Jennie Garth, Rachel Bilson, Daisy Lowe, Kelly Ripa, Kevin Connolly, Rihanna, Ashley Greene, Karl Lagerfeld, Michelle Bombshell McGee And Naomi Watts In The Best And Worst

Stars flocked to the Los Angeles premiere of Middle Men, where former Girl Next Door Bridget Marquardt didn’t quite have us green with envy over her tie-dyed maxi dress! Selma Blair, however, resurfaced on the red carpet in an absolutely breathtaking way.  The petite actress rocked a Stella McCartney strapless mini from the Fall 2010 collection, which featured a sheer overlay. Ex-Real World star Jacinda Barrett also scored herself a Best nod, looking fab in a silver short-sleeved mini, which featured a dash of pastel embroidery.