The last four weeks have felt like a serious marathon for your Who What Wear editors. Between covering the F/W 11 show season's stylish attendees, promoting our new book, and revealing our curated shoe collection, we've barely had a moment to enjoy the month of March. Fortunately, we're finally able to catch our breath and enjoy the fact that spring is officially here! And we couldn't think of a better way to close out this hectic month than with another instalment of What Was She Wearing: Answers!. Because frankly, whether you're enjoying spring vacation or just need a quick break from work, nothing's better than perusing a handful of inspirational outfits. So if you're obsessing over Sienna Miller's vibrant accessories or must know how you can recreate Fearne Cotton's savvy mix, we're happy to say you've come to the right place!

1. Fearne Cotton
Cropped pants are a spring wardrobe must-have, which means we're currently on the lookout for inspiring ways to wear them. Accordingly, we were thrilled when your inquiries came pouring in about the outfit Fearne Cotton put together, above. The blonde beauty was photographed leaving work in London last week wearing a pair of khaki Darling trousers with the Peter Pan Button Blouse ($47) from her collection for and a vintage blazer. We were particularly pleased with the way she styled her strappy Office shoes with sheer black socks--it brings a little quirkiness to her look--and that she finished her outfit with the covetable Mulberry Tillie Bag ($1175). Fortunately, mastering this smart mix is simple; just grab your favourite blazer and her exact blouse, and pair them with Old Navy's Slim-Fit Cropped Perfect Khakis ($25). If you're looking to truly execute Cotton's A+ outfit, be sure to pick up Hue's Sheer Lurex Anklet Socks ($4) and Topshop's Wire Orange Suede Platform Wedges ($150).

2. Alexa Chung
Looking to add a little colour into your wardrobe this spring? We recommend following in Alexa Chung's footsteps and trying a bold coloured pant. As the stylish Brit so aptly demonstrated at the GQ Style 2011 party in London last week, colourful jeans are an excellent way to punctuate your all-black basics. Chung styled Topshop's Moto Pink Jamie Jeans ($80) with a vintage polka-dot blouse, a jacket from her sold out collection for Madewell, and lace-up Prada ankle booties. If you're interested in giving this ensemble a try, be sure to grab a pair of her exact jeans before it's too late! Now if that particular colour doesn't work for you, Topshop also offers a few additional hues, like a bright red and yellow, which are definitely worth checking out. Once you have your denim finalised, style it with a Sonia by Sonia Rykiel's Polka Dot Blouse ($295) and Me Too's Lisbon Oxfords ($109) for a true Chung-inspired ensemble.

3. Rihanna
You certainly admire Rihanna's adventurous and cutting-edge sensibilities, but of course, it's not all sky-high heels and crop tops for this beauty: she excels at casual looks too. For example, you spotted the gorgeous singer leaving a restaurant in Los Angeles early last week wearing a colour-blocked sweater dress--which is from Celine's Pre-Fall 10 collection and is sadly no longer available--with the Parisian fashion house's City Loafers ($750, available at select Barneys New York stores) from the S/S11 collection and Prada's Natural City Calf Double Top Handle Tote Bag ($2295). To create your own version of this excellent outfit, start with Plenty by Tracey Reese's Intarsia V-Neck Sweater Tunic ($178) or Milly's Italian Ponti Combo Jenny Colorblocked Dress ($365); the latter is a lovely choice if you're looking for a spring-ready look. Once you have your dress sorted out, grab Cole Haan's Air Patent Leather Loafers ($165) or Tod's Heaven Loafers ($365) and accessorize with Kate Spade's Cobble Hill Leslie Bag ($425). The cosy ensemble is simple, yet still feels very chic, so it's an excellent option for a casual date night.

4. Sienna Miller
While our previous instalment of What Was She Wearing: Answers! featured Sienna Miller in a fabulous mix of neutrals, today we're delighted to find the stylish actress wearing a few of spring's neon hues. Miller was snapped leaving The Box Club in London last week wearing Burberry Prorsum's Boyfriend Fit Military Leather Biker Jacket ($3595) over a Twenty8Twelve t-shirt and Sienna Jeans ($215, 888.282.6060). To add a punch of colour to her look, she accessorized with a pair of bright red ankle boots by Chloe and Prada's Mandarino and Nero Madras Leather Bag ($2650) in Tangerine Orange and Black. To create your own Miller-inspired ensemble, we suggest starting with the basics. Kinder Aggugini for Impulse's Cropped Motorcycle Jacket ($299), American Apparel's Fine Jersey Short Sleeve T-Shirt ($18), and Forever 21's Denim Capris with Ankle Zippers ($20) can certainly serve as the foundation of your look. As for the colour portion of her ensemble, try Melie's Bianco Tote ($93) and Gee WaWa's Desert Boots ($90) in Red, which are both equally striking, but more budget-friendly alternatives.

5. Chloe Sevigny
Here at Who What Wear, we're pretty much obsessed with all things Chloe Sevigny, from her eponymous clothing line for Opening Ceremony to her truly addicting HBO show, Big Love, may it rest in peace. Also amazing: her quirky yet brilliant sense of style! It's always exciting to see what the actress/designer is wearing, whether it's for a red-carpet event or a casual errand run. Speaking of the latter, you were dying to know more about the outfit she put together for an afternoon lunch in West Hollywood last week, and fortunately, we have all the answers. Sevigny looked ready for spring in Opening Ceremony's T-Shirt Onesie ($245) and a vintage Wrangler jean jacket. She accessorized with a few season essentials, like Proenza Schouler's Medium Shopping Tote ($615) and the Jackie Sunglasses ($375) from her line for Opening Ceremony, and finished her outfit with a pair of Chanel clogs. To construct a similar ensemble, snag a lightweight one-piece, like Cut 25's Striped Romper ($198) or Forever 21's Striped Romper ($20), and a light-wash denim jacket; Diesel's Pocketed Denim Jacket ($200) is one of our favourites. Now, if you haven't already snagged a few pairs of clogs, you won't want to miss Lucky Brand's Lucia Clogs ($109), which remind us of Chanel's covetable styles from last spring. Finally, we recommend accessorizing your look with Wood Wood's Tote Bag ($153), as it is the perfect carrier for all your spring and summer essentials.--Jessica Baker