Websites, magazines and social networking sites such as Pinterest, Twitter and Instagram are all great sources of outfit inspiration. That said, celebrities are responsible for starting a lot of trends and we are always intrigued to see what looks they will try next. When Nicole Richie was spotted wearing a skull print Alexander McQueen scarf, high-street versions of the iconic scarf soon sold out. Rihanna has been rocking a flat brimmed hat for quite a while now and you can pick your own version up in River Island, Penneys and Topshop. Here are the looks we've been crushing on this week, and while we don't have the same budgets as celebrities, we can still get ideas for outfit inspiration from them. Kate Bosworth Thanks to Kate, the polo neck is officially cool. This pencil dress is elegant yet modern, and even better it's a look that's easily copied. Pencil skirts and structured dresses are everywhere at the moment so invest in this timeless classic and pair it with patent stilettos for Bosworthy chic. Amy Adams Amy Adams wore a Tory Burch gown to a TIME magazine gala last week and it's a gorgeous look for the award-winning actress. The American Hustle star wore navy to the Academy Awards this year too and it's definitely her colour. Kate Moss Kate Moss launched her new range for Topshop last week and as predicted, it took the fashion world by storm. Supermodel turned Vogue contributing editor Kate was at the Topshop's flagship store on Oxford Street to launch the line. She wore a classic pinstriped two piece from her new range, reminiscent of Yves Saint Laurent's 'le smoking' suit, and as always she rocked it. Cara Delevingne This year's Met Gala took place last night at the Metropolitan Museum of Art and there were an abundance of gorgeous celebrity looks. Cara went for a fashion forward feel in this Stella McCartney ensemble, the impeccably tailored pants and cutaway cropped top ensured she stood out in a sea of voluminous dresses. Suki Waterhouse Model Suki proved that the ballgown is still very much en vogue thanks to this princess inspired beautiful Burberry number. Some might say it's over the top but this girl can definitely work it. This was one of the stand out dresses of the night and we wish we could get Burberry to dress us too! Blake Lively and Ryan Reynolds The award for star couple at the Met Gala has to go to Ryan and Blake. Ryan is suited and booted in a sharp tuxedo and Blake's metallic Gucci dress is stunningly gorgeous. Featuring sequinned embellishment and a plunging neckline, the former Gossip Girl actress looks every inch the glamorous Hollywood starlet.