Fashion week is now OFFICIALLY half way through, as the intrepid fashionistas head to Milan for the continental leg, with various events taking place in the style capital of Italy.At the Vogue Italia 50th anniversary party, we spied Brit Poppy Delevingne in a gorgeous flowing white gown, Rosario Dawson wowed in a stunning light blue number, and Anna Dello Russo was her usual flamboyant self in a short cocktail dress with a large yellow flower on the right-hand side.The night before at the amfAR Milano event, Ashley Madekwe looked gorgeous as ever in a Wes Gordon dress, while Coco Rocha killed it in a structured white floor-length gown.In Las Vegas at the  iHeartRadio Music Festival, it was a much more casual affair with Black Eyed Peas singer Fergie Duhamel in an oversized sheer white blouse and Gianvito Rossi boots, and Sophia Bush in Monique Lhuillier.However, our favourite look of the weekend was Jessica Chastain's elegant and summery yellow Erdem frock, which she wore to the Salome &amp; Wild Salome film premiere in London.See more of our favourite looks by clicking on the gallery below(Images: Rex Features)

Jessica Chastain, Coco Rocha and Anna Dello Russo are among this weeke

Fergie Duhamel - 20 Sept

Anna Faris - 20 Sept

Hilary Duff - 20 Sept

Sophia Bush - 20 Sept

Leigh Lezark - 20 Sept

Bella Thorne - 20 Sept

Bar Refaeli - 20 Sept

Jessica Chastain - 21 Sept

Ashley Madekwe - 20 Sept

Amber Le Bon - 20 Sept

Coco Rocha - 20 Sept

Jennifer Morrison - 21 Sept

Ginnifer Goodwin - 21 Sept

Karolina Kurkova - 21 Sept

Linda Evangelista - 21 Sept

Poppy Delevingne - 21 Sept

Rosario Dawson - 21 Sept

Anna Dello Russo - 21 Sept

Eva Herzigova - 21 Sept

Bar Refaeli - 21 Sept

Alessandra Ambrosio - 20 Sept

Charlotte Riley - 21 Sept

Helen McCrory - 21 Sept

Kerry Washington - 20 Sept

Portia de Rossi - 20 Sept

Jessica Chastain, Coco Rocha and Anna Dello Russo are among best dressed on the red carpet