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Does Kate Moss ever get it wrong? The supermodel (and now published author) stepped out to celebrate the launch of her new coffee table tome Kate: The Kate Moss Book in London tonight, and was joined by celebrity pals like Stella McCartney, Donna Karan, Topshop founder Sir Philip Green, and Boy George

Kim Kardashian was spotted out and about in Miami looking sporty in a black leather-sleeved varsity jacket and gray skinny jeans. The reality star completed her look via a white tee, black pointy pumps, flat-top sunglasses, and a black studded clutch. This isn't the first time we've seen Kim in a varsity jacket; she wore a black and white one back in September, too. To nail Kim's latest look, shop this similar Forever 21 faux leather varsity jacket ($33), then pair it with your gray skinny jeans and pumps.

Sometimes it's difficult to create an ensemble that's both stylish and cool-weather appropriate, but Emma Stone's latest NYC look proves it's possible to be toasty and trendy. The actress styled her signature sweater and blouse combo with true blue skinny jeans and black ankle boots, then topped her cozy look with a plaid buckle coat and slouchy gray beanie. We love how her printed topper breaks up her neutral staples and adds a touch of personality to this casual daytime look. Re-create Emma's layered look with a gray sweater, blue denim, black ankle boots, a beanie, and a plaid coat for a day of errands.

Kourtney Kardashian did some shopping at Hermés in Paris wearing her favorite black leather Valentino jacket ($4,800) and chic black and white tuxedo pants. She toughened things up via these Valentino combat boots ($1,295), then added major luxe via her black Hermés bag. Shop these similar Worthington tuxedo pants ($25), then pair them with your black leather jacket to nail Kourtney's latest look. Wear lace-up boots for comfort and cool, then swap for pumps or sandals for a fancier feel.

We are thrilled to share this story from Lauren Conrad! The TV personality, writer, designer, and style maven has started LaurenConrad.com, a social networking site that features daily posts by Lauren on all of our favorite topics — fashion, beauty, food, party planning — and Lauren will be sharing her latest fashion finds with Fab every month. This week, she's giving us an accessory report on her must-have bags for Fall.

A purse is like a woman’s personal sidekick. It’s there to give her every necessity at any given moment. And it sticks by her side no matter what. Therefore, it is of utmost importance that said “sidekick” is just as fashionable and practical as the woman who carries it. There are few shopping moments as exciting as finding that perfect bag. (Discovering a gorgeous pair of shoes is a close second.) While the true purpose of a handbag is to tote around lipstick, mints, money, and all those other necessities, it goes without saying that curating a collection of pretty purses is key.

Related: Style Guide: Finding the Perfect Coat

When LaurenConrad.com member Lui requested a blog post about which bags to buy for fall, I couldn’t wait to write about one of my all-time favorite accessories. If you ask me, there are 5 essential categories of carryalls that every girl ought to have in her closet. Check them out below:

Keep reading for all of Lauren's bag must-haves

Katharine McPhee reported to the NYC set of Smash looking cozy and cute in a bundled-up look for her character Karen Cartwright. She started with a snake-print blouse, a tie-dye scarf, topped with a leather-sleeve open jacket. On bottom, the actress wore skinny jeans and these Rag & Bone black booties ($495). She carried a black satchel on her arm and wore gold teardrop earrings for some shine. Mimic Katharine's onscreen style by shopping the widget below.