Stars sizzled and fizzled in summer style during the first week of August, stepping out on the streets and hitting the red carpet in the Best and Worst of fashions.

Who cares about The Other Guys, when Eva Mendes is on the red carpet? The hard-bodied bombshell got clad in truly fem fashion, rocking a hot-off-the-runway Oscar de la Renta party dress from the Resort 2011 collection with Sergio Rossi heels to the NYC premiere of her movie. Mark Wahlberg and Will Ferrell may have been in their most dapper duds, but there is room for only one Best Dressed of the Week on our list.

Just when we though Bjork couldn't trump her infamous Academy Awards swan costume, we spotted the Icelandic singer at the Finnish premiere of Moomins and the Comet Chase dressed like Shrek! Wearing a boxy and pouf-shouldered green dress with colorful tights and edgy booties, she definitely was not dressed to impress.

Gwyneth Paltrow and Jessica Alba were casually chic on the streets. Both leading ladies are embracing the latest trouser trend, jazzing up the surplus staples with luxe jewelry, shoes and handbags.