It's tough-meets-girly for Rachel Bilson, who teams a draped leather jacket with her Chanel floral shift and red bag at the label's Spring/Summer 2011 Paris show.

Style tip: Take a cue from Bilson and mix it up! Toughen up a girly-girl frock with an edgy item -- whether it's a rock-inspired jacket or studded platform heels

Looking chic and polished at Chahttp://ilovekhmernas.blogspot.com/nel's Spring/Summer 2011 Paris show, actress Keira Knightley is all decked out in an elegant black and gold ensemble -- a Chanel dress, blazer and bag complete with Miu Miu shoes.

Style tip: Make a metallic party-worthy dress more sensible and perfect for a work-related soiree by teaming with a neutral square-cut jacket (try a classic, unembellished blazer like Knightley's) and pumps.

Katherine Heigl looks red-hot fabulous at the New York City premiere of her new movie "Life As We Know It" in a ruby-hued fan-pleated one-shoulder cocktail dress from David Meister

New mommy Amy Adams flaunts her fabulous post-baby figure in a curve-skimming one-shoulder pink dress from Roland Mouret, complete with neutral accessories at the Variety's 2nd Annual Power Of Women Luncheon.