Wednesday night, roomies (slash costars, slash coworkers slash joined-at-the-hipsters) Whitney Port and Roxy Olin got all dolled up and hit the party circuit in their red carpet finest. So how'd they avoid stepping on each other's toes? Simple: they stayed approximately three thousand miles apart. Yep, while Whit went West Coast wildin' at Us' Hot Hollywood party (along with Hillzies Stephanie Pratt, Kristin Cavallari and Audrina Patridge), Roxy held down the fort in NYC at the taping of the 2009 mtvU Woodie Awards.

Check out both gals' gorge going-out ensembles (BTW, is it bad that Whit's lacy white frock reminds us of the "doily" dress from Reality Bites?!) and tell us whether you're more in love with Roxy's loose locks/copper-colored wrap -- or Whitney's delicate ringlets/beaded baby-doll.

As the reigning smog capital of the world, L.A's pretty much the last place you'd wanna go to bone up on your astronomy. 'Course, if it's stargazing you're after, you won't find a better view on this side of the equator -- and last night, all the biggest/brightest stars of Tinseltown were out at Us Weekly's annual Hot Hollywood party.

So who lit up the room? Amid the usual melange of musicians, socialites and actresses (like Leona Lewis, Nicky Hilton and Eliza Dushku), Hillzies Kristin Cavallari, Audrina Patridge and Stephanie Pratt glimmered and shined in glitzy metallics, sparkly bangles and sexy corsets. Take a look at our Hills gals' shimmery red carpet style and let us know who you think had the most dazzling dress of the night!

Ever heard the saying 'fake it til you make it'? Well, given the current financial sitch, our closet's mostly packed with discount designer duds (i.e. Marc Jacobs markdowns) and items that could almost pass for the real deal. And since not everyone grew up on a steady diet of Loehmann's and Filene's Basement, we thought we'd share some of our tricks of the trade and show you how to get the look for less! Starting with: Lauren Conrad's latest red carpet ensemble.

LC looked like a million bucks at last night's Samsung launch party, sizzlin' in an LBD (with sexy, ruffled skirt), a flowy black cardigan and playful peep-toe pumps. Natch, we'd love to steal the clothes right off her back, but since we're stuck on separate coasts, we went to Forever21.com instead and found these similar styles (we particularly heart the tiered spaghetti strap dress!).

The best part? All together, the dress, cardi AND heels come out to just under $80 (the priciest item, the three-quarter length sweater, is only $27.80). Which means you'll still have plenty of loot left over to splurge on LC's metallic green mani-pedi before showing off that toe cleavage! Just make sure your nails are 100% dry before you go patting yourself on the back...

It's not easy being the most fashionable girl in the room, but City star Olivia Palermo makes it look almost effortless. Her secret? Style, sophistication and, of course, invites to all the hottest parties in town. This week, Liv popped by five (count 'em, FIVE) different VIP venues, showing off a whirlwind of fall essentials (think: flashy fishnets, leather leggings and faux-fur vests) and makin' the rounds with everyone from her sweetie, Johannes Huebl, to her fashion bestie, Marc Jacobs.

Check out these pix of Liv working it on the red carpet (watch out for Huebl's razor-sharp cheekbones up top!), plus take a look at three of her most envy-inspiring looks.

Roxy Olin wasn't lying when she told Kelly Cutrone she loved black. Girl's got more darks in her closet than a recently-widowed witch. So how does she stay true to her black leanings without coming across as one note? Accessories, accessories, accessories! When she's not mixing in prints (or even florals!), Roxy keeps her look fresh with chunky jewelry, sexy/sheer stockings and a hefty stash of high-waisted belts. Check out what she wore to the opening of Gap's new Soho store last week, then see how she switches up her style (if not her red carpet poses!) in the pix below.

Whitney Port's got denim for days, more shoes than Imelda Marcos and enough party dresses to last her til New Year's Eve 2050. So what's the one accessory she can't live without? Duh, her dazzling smile! But girl also loves her Chanel. In a recent interview with the Daily Mail, Whit admitted she takes her cream-colored Classic Flap bag with her "everywhere," and a quick search on Getty proved these two are a match made in heaven. Take a purse-onal look at our City gal (and her fave plus-one) then tell us about your own go-to fashion accessories!

You might remember Stephanie Pratt's niece (a.k.a. the adorable Ava) as the frilly-dressed flower girl from Speidi's wedding. So what's the World's Cutest Kid been up to ever since? Easy: bonding with her favorite auntie (and built-in babysitter!) Steph! Over the weekend, the Hillzie treated her pint-sized charge to a fun-filled afternoon of ice cream, movies and, yes, a stroll down the red carpet at the Planet 51 premiere! Hmm, anyone else think pretty, pretty princess tiaras are totally making a comeback this year?

+ Bonus: In addition to eying her niece's accessories, Steph also sneaked a peek at Rebecca Minkoff's Spring 2010 handbag/ready-to-wear lines. Check out these pics of Steph scoping out the merch (and posing with the designer!), after the jump.

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It's been waaaay too long since we've seen Speidi in a spontaneous -- but meticulously planned -- photo shoot. Fortch, Mr. and Mrs. Pratt were back up to their old tricks last night, when they rolled through JFK airport with all the subtlety of a five-alarm fire.

Primed and ready for their closeups, the giggly newlyweds put on quite a show for NYC onlookers (and, of course, the paparazzi), laughing, sucking face and grinning like a couple of teenagers in love/businesspeople with a book to promote.

Check out these pix of the Pratts descending on the Big Apple (with their copies of How To Be Famous in hand), plus watch as they personally demonstrate the importance of chapter five: "The Paps Are Your Friends!"

While you were cryin' your eyes out at Grey's Anatomy last night, Hills stars Stephanie Pratt and Lo Bosworth were giggling up a storm at the Undrest Pop Shop opening in L.A (or, the "undrest undie party," as Lo nicknamed it on Twitter).

Hangin' out together for the second straight night, (Wednesday was all about Maxim and micro-minis!), Lophanie surveyed the sexy underthings then got all Agent Provocateur in lacy black gloves and silky blindfolds. Check out these pix of the ladies scopin' out lingerie, then stick around and admire their pre-panty party poses, after the jump.

We already saw Kristin get the best of Jayde on Tuesday night's 'I'm With Brody!' showdown. But who's got the edge in terms of style? After spotting both girls rockin' the hottest trend of the season (hint: it rhymes with shmannel!), we thought we'd give 'em a chance to battle it out in an RC fashion faceoff! Think K-Cav deserves snaps for her low-key look? Or are you more into Jayde's fancy spin? Take a look, then tell us who was workin' it in plaid!