This week's fashion round-up: starring Cameron Diaz, Kate Winslet and Emma Watson

In a black lambskin dress by The Row and Manolo Blahnik pumps at the premiere of The Other Woman in London.

In a Zara dress at the 'Retail Therapy' event at Reed Krakoff in New York.

(Image: Instagram)

In an Alexander Wang top featuring a ‘Parental Advisory’ logo, at the 'The Glamour of Italian Fashion 1945-2014' exhibition at the V&A in London.

In an Antonio Berardi dress at the season 7 premiere of Mad Men in Los Angeles.

In a black leather Alexander McQueen dress at the season 7 premiere of Mad Men in Los Angeles.

In a Stella McCartney jumpsuit at the New Museum Spring Gala in New York

In a Zuhair Murad gown at the premiere of Divergent in Berlin.

With Jay Z at the Brooklyn Nets Vs Houston Rockets NBA Basketball game at the Barclays Center in New York.

At New York Observer's 'New Look' at Casa Lever Restaurant.

At the VIP dinner for the 'The Glamour of Italian Fashion 1945-2014' exhibition at the V&A in London.

In a Roberto Cavalli dress at the VIP dinner for the 'The Glamour of Italian Fashion 1945-2014' exhibition at the V&A in London.

In a Roberto Cavalli gown at the VIP dinner for the 'The Glamour of Italian Fashion 1945-2014' exhibition at the V&A in London.

In an Emilio Pucci gown at the VIP dinner for the 'The Glamour of Italian Fashion 1945-2014' exhibition at the V&A in London.

At the VIP dinner for the 'The Glamour of Italian Fashion 1945-2014' exhibition at the V&A in London.

At the Haneda International airport in Tokyo.

In Dolce & Gabbana Sicilian Floral boots, house hunting in West London.

Out and about in New York.

At the Firehouse Club in London.

In a Ralph Lauren gown at the premiere of Noah in London.

At the premiere of Noah in London.

In a pair of Benjamin Eyewear sunglasses.

(Image credit: Instagram)

In a Jenny Packham gown at at the Jameson Empire Film Awards in London.

In an Erdem outfit at the Jameson Empire Film Awards in London.

In a Jenny Packham gown at at the premiere of Divergent in London.

In a Stella McCartney gown at at the premiere of Divergent in London.

At the LAX airport in Los Angeles.

At the Earth Hour Kick-Off With Spider-Man in Singapore.

In a yellow dress, flower statement ring and what the star dubbed as "Easter make-up" featuring her new nail lacquer line for Walmart in the pale blue shade 'Thistle or That'.

(Image: Instagram)

Out and about in New York.

In a Victoria Beckham frock at the 20th Century Fox Pictures presentation at CinemaCon 2014 in Las Vegas.