We've all had those days when the little things seem to frustrate us to no end, whether it's making a business call with little-to-no reception or putting together a piece of furniture with impossible to decipher directions. Another thing that fits into this category: having burning questions that no one can seem to answer! We're not talking about whether your friend actually thinks you have acting potential or if a suitor will call you back after the first date. No, we're discussing your most pressing celebrity fashion queries, of course! We know you might be discouraged if searching for Sienna Miller's dress has left you stumped or locating Kate Moss' striped pants has brought you nothing but bewilderment, but that's where we come in! In this instalment of What Was She Wearing: Answers! we've got all the details on today's five stellar outfits, so read on for the need-to-know information, including how to recreate the looks yourself. Enjoy!

1. Kate Moss
Kate Moss is a seasoned veteran of the fashion game, so it's no surprise that her effortless ensembles continually catch your eye! Spotted shopping in London last week, the style maven pleased enthusiasts with her black Yves Saint Laurent tuxedo jacket (a covetable piece from a few seasons ago) and Isabel Marant's quirky-yet-chic striped pants from the S/S 10 collection. Moss accessorized her awe-inspiring daytime ensemble with Dolce & Gabbana's Sunglasses ($590, 212.965.8000) and Miss Sicily Handbag ($3246, 212.965.8000), and finished with Repetto's Suede Ballet Flats ($265). To create an outfit with a comparable classic-meets-offbeat vibe, try pairing BCBCMAXAZARIA's Amy Tuxedo Jacket ($119) with ASOS' Houndstooth Slim Waistband Crop Pants ($69), and then slip on a pair of J. Crew's Cece Suede Ballet Flats ($128). Finally, grab ASOS' Faux Croc Day Bag ($60) for a satchel that's of a similar shape, or opt for River Island's Circle Look Contrast Satchel ($103) to give your look a seasonal pop of colour, and you're set for a day of uber-chic strolling a la Moss!

2. Whitney Port
When we first spotted Whitney Port in this simply fantastic summer dress, we knew that a slew of reader inquires were sure to follow--and we were right! The designer/style star was snapped out in Los Angeles last week, wearing a multi-coloured vintage dress with Cocobelle's Natu Ankle-Wrap Sandals ($187) and a pair of oversized Tom Ford sunnies. To round out her beach-ready look, Port selected Coach's Stewardess Bag ($358, available at the end of July), resulting in the perfect warm-weather combo. Although you won't be able to snag Port's exact dress, we suggest checking out 12th Street by Cynthia Vincent's Waisted Racer Tank Dress ($335) or Roxy's Tropics 2 Dress ($55) before your next summer soiree. If you unable to splurge on the rest of her smart picks, you're in luck, because Lauren by Ralph Lauren's Astrid Sandals ($69) and Nine West's Innovation Large Messenger Bag ($44) in Oatmeal are excellent alternatives at a fraction of the cost.

3. Emma Roberts
Emma Roberts went for a playful look for the Los Angeles screening of her latest film The Art of Getting By earlier this month, and her delightful colour combo stirred up quite the fashionable frenzy! The actress turned heads in a bright green Amanda Uprichard Racer Ponti Dress from the F/W 11 collection styled with cobalt blue Report Signature shoes, resulting in a fresh take on colour-block dressing. Minimal accessories, including House of Lavande's 1960's Panetta Blue Earrings ($398), keep the overall outfit looking perfectly polished and refined--a smart wardrobe choice, indeed! Her vibrant picks are certainly lust-worthy, but we recommend checking out Shoshanna's Boat Neck Party Dress ($295) or Zara's Dress with Split ($80), and pairing either one with Steve Madden's Sarrina Pumps ($100) to construct a similar flashbulb-worthy outfit.

4. Naomi Watts
Naomi Watts never fails to impress with her particular brand of casual chic, and today's outfit is no exception! The actress piqued your interest last week while out and about in New York, when she wore a silky white Stella McCartney blouse and cropped Madewell trousers (which are no longer available). Watts expertly teamed her slouchy separates with a Stella McCartney blazer and her go-to accessories--Robert Clergerie's Jili Oxfords ($495, 212.826.8900), Roger Vivier's Prisme Filoche Tote Bag ($3450, 212.861.5371), and a Jennifer Fisher necklace to be exact--which give her outfit a sophisticated finish. If you're searching for some look-a-like separates to add to your summer wardrobe, be sure to check out DKNYC's Two-Button Boyfriend Jacket ($78), Topshop's Basic Zip Back Vest ($55), and Hei Hei's Pismo Pants ($78). Of course, if you don't already own a pair of oxfords, you must check out Frye's Erin Oxfords ($100) and Urban Outfitters' Chelsea Crew Perforated Oxfords ($30) today!

5. Sienna Miller
Though you've spent the last few months fawning over Sienna Miller's impressive off-duty attire, lately your attention is focused on the actress' supremely chic after-hours ensembles. And with top-tier outfits like today's all-noir mix, it's easy to see why! Miller stepped out in London last week, wearing a delicately pleated Diane von Furstenberg dress with strappy Burberry heels, however, it was her rubber and chain-link Paco Rabanne's Metal Le 69 Bag ($1900, 310.274.8800) that really stole the spotlight. If you were hoping to put together an equally savvy ensemble, we would like to first direct you to Motel's Riley Dress ($104), which shares a similarly sheer neckline and party-perfect silhouette as Miller's DVF pick. Next, we recommend picking up ASOS' Ronnie Suede Cross Strap High Sandals ($95) or Forever 21's Strappy Sandals ($25). Finally, snag Whiting & Davis' Crystal Classic Minaudiere ($116) to give your outfit the perfect Miller-inspired finish.--Jessica Baker with Erin Fitzpatrick and Calin van Paris

Photos of Kate Moss and Emma Roberts, courtesy of Getty; Photos of Namoi Watts, Sienna Miller, and Whitney Port, courtesy of Splash