A hefty divide between pastel perfection and monochrome classics, this month's best dressed list sees plenty of event dressing. From Gucci to Magnum, the Billboards to CW parties (not to mention the Cannes Film Festival), May has given the common fashion lover plenty of ideas for what to wear to your next company-hosted soiree. Blake Lively and Mary Katrantzou make more than one appearance each, whilst new additions such as Lily James and Marina Diamandis make their first appearance in my best dressed lists in Ralph Lauren Collection and Fendi respectively. Let the wardrobe inspiration commence...



Blake Lively - Gucci | Rihanna - Dior | Blake Lively - Valentino



Poppy Delevingne - Chanel | Kendall Jenner - Olcay Gulsen | Rosie Huntington-Whiteley



Kiernan Shipka - Peter Pilotto | Emma Roberts - Katie Ermilio | Jessica Alba - Mary Katrantzou



Liv Tyler - Dolce & Gabbana | Karlie Kloss - Lanvin | Lily James - Ralph Lauren Collection



Diane Kruger - Giambattista Valli | Shakira - Julien Macdonald | Rachel Bilson - Mary Katrantzou



Christy Turlington | Alexa Chung - Calvin Klein | Marina Lambrini Diamandis - Fendi



Rosie Huntington-Whiteley | Camilla Belle - Gucci | Kate Bosworth



Amanda Seyfried - Longchamp | Gisele Bundchen - Dolce & Gabbana | Elle Fanning - Valentino