Here at Who What Wear, we never shy away from a challenge; in fact, we thrive off them! Whether it's narrowing down the season's top trends, sleuthing through hundreds of items to find the best products, or piecing together our next fashion editorial, we love tackling big projects on your behalf, dear readers. But of all the sartorial conundrums we face on a daily basis, our favourite has to be solving the outfit mysteries of your top style icons. After all, nothing pleases us more than uncovering the exact designer of Kate Bosworth's sultry frock or Fearne Cotton's bright red pants and figuring out where you can purchase them! But of course the heavy lifting doesn't stop there, we've also rounded up loads of alternative pieces to help you create similar head-turning outfits. What can we say--it's all in day's work!

Fearne Cotton
Every day, Fearne Cotton is snapped walking into work at BBC 1 Radio, which means each morning we are greeted with another fabulous Cotton ensemble. The British TV/radio personality always puts together unique and wonderful outfits that are hard to ignore, like the look you spotted her in just last week. Much like her new pretty blonde tresses, you were head-over-heels in love with Cotton's intriguing pair of Topshop jeans in a happy red hue--a nod to the season's obsession with the bold colour, no doubt! She polished off her ensemble with a few obsession-worthy pieces in muted tones, like her Mulberry Admiral Coat ($1150) in Grey Melange Wool, vintage top, and brown Marc Jacobs bag. Want to recreate Cotton's eye-popping outfit? Paul & Joe's Jacoue Mid-Rise Straight Leg Jeans ($280) are an absolute must! They come in a similarly playful red hue and have that great slim cut we adore so much. Next, grab Imitation's Nubby Trench Coat ($338) and B. Makowsky's Ollie Large Crossbody Satchel ($298); together these key items will give your look a chic finish.

Kate Bosworth
As fellow Kate Bosworth fans will certainly agree, the gorgeous blonde can do no wrong in the wardrobe department, as today's look demonstrates. Bosworth was spotted arriving at the Chateau Marmont for a Golden Globes after-party last week in a one-of-a-kind Burberry dress with a peek-a-boo mesh insert. Careful not to upstage the frock's awe-inspiring blue hue and sultry cut, Bosworth accented her evening outfit with a few chic silver pieces, including Burberry sandals (check out their Studded Patent Leather Sandals ($450) for a similar style), a Calvin Klein Collection clutch, and a JewelMint bracelet ($30)--a coveted piece from her jewellery collection with stylist Cher Coulter. To put an equally eye-catching ensemble together, start with Motel's The General Dress ($78) or Elizabeth and James' Naomi Sheer-Insert Dress ($325). Style either frock with Urban Expression's Silver Large Envelope Snakeskin Clutch ($48) or Dyeables' Brielle Ankle Strap Sandals ($59), and you'll be the envy of all your friends at your next girls' night out.

Ginnifer Goodwin Feminine and sweet were the first words that came to mind when we saw Ginnifer Goodwin at the Big Love premiere in Los Angeles earlier this month. The darling actress--sporting her new super-cute pixie cut--looked stunning in Valentino's Tie Neck Tiered Button Front Long Sleeve Dress ($2590, 212.772.6969) and Brian Atwood's Drama Heels ($660) in Nude. The flirty hemline and bubblegum pink hue make this frock a lovely choice for spring, so be sure to snag a similar style, like J. Crew's Silk Organza Soiree Dress ($275) in Ornamental Pink, and pair it with Steve Madden's Glaamm Pumps ($90) for your next garden party.

Katie Holmes
While there has been plenty of buzz surrounding Katie Homes' controversial television series, The Kennedys, and why it won't be aired, you're more concerned with getting the inside scoop on her impeccable personal style--specifically, the delightful combo she put together late last week. Holmes stepped out in Brentwood wearing Equipment's Classic Blouse ($174) in Nature White and cuffed navy Isabel Marant pants from the F/W 10 collection. You love that she kept her look chic by pairing the bold polka-dot print trousers with a basic top, and were hoping to create an equally noteworthy outfit for yourself; fortunately, it's an easy and inexpensive task! Just pick up a pair of Motel's Night Sky Print Tapered Susan Pants ($66) and team them with a simple top, like EightSixty's Off White Button Front Blouse ($56), and you'll be ready to tackle a day of errands in style.

Emma Roberts
Emma Roberts selected a low-key outfit for an afternoon of shopping in Los Angeles two weeks ago. The Scream 4 actress was snapped wearing a Kate Moss for Topshop brown tee, Firetrap leather jacket, J Brand 901 Leggings ($139) in Olympia, and Isabel Marant grey suede boots. For a similarly cool and laidback combo, try G-Star's Lewis Leather Jacket ($460) over Alternative Apparel's Modal Silk Half Sleeve Croppy Top ($50) in Cairo, then pick up either Sam Edelman's Farell Suede Booties ($175) or Bagatt's Ankle Boots ($109). For the final piece of your look, you'll want to snag Betsey Johnson's Ombre Crystal Sunglasses ($75), which are almost identical to Roberts' Tom Ford Bachardy Sunglasses ($450)--a thrilling find indeed!--Jessica Baker

Photos of Kate Bosworth and Emma Roberts, courtesy of Pacific Coast News; Photo of Ginnifer Goodwin, courtesy of INF; Photo of Katie Holmes, courtesy of X17; Photo of Fearne Cotton, courtesy of Splash