Best Celebrity Style March 5, 2012

This week's highlights span the gap between effortless street style and pulled-together PFW looks — not to mention the jump between seasons as the style crowd preps for Spring. Olivia Palermo stayed ultra-chic in all black in Paris, Gwyneth styled an elegant take on menswear in Louis Vuitton, and London fashion fixture Poppy Delevingne gave us a perfect lesson in how to style red denim. Inside, there's more from our favorites — like Kate Bosworth's sweet Spring shift — so click on to see who made the top 10 this week.