White Button Downs

Katie Holmes caught a Broadway show in NYC looking classic with major modern flair. The actress started with a silky white button-down and black trousers, then added a wow factor via a blue cropped jacket. On bottom she wore taupe suede booties, and she carried a chain-strap bag on her shoulder. A simple silver bangle and gold drop earrings completed her nighttime chic. Re-create Katie's look by starting with the basics — a white blouse and black pants — then complete your outfit with a sharp jacket in a bold color. We love this blue cutaway jacket from Forever 21 ($30) and this blue blazer by BB Dakota ($93), but you can choose any color you like.

At The X Factor's season two finale in LA last night, Khloé Kardashian matched this pleated leather Alexander McQueen skirt ($581, originally $1,660) with this sequin Carolina Herrera blouse ($2,290). Her menswear-inspired style was right on trend and we love the edgy touch of her neon Christian Louboutin pumps ($1,195). Shop Khloé's exact pieces or mimic her look on a budget with this bow-tie ASOS blouse ($56) and this faux leather Sparkle & Fade mini ($59) for an upcoming holiday soiree.

Victoria Beckham showcased her sleek style in a pair of matchstick Isabel Marant pants, a purple military-inspired coat ($3,640), and a classic white button-up, both from her own line, at the London opening of Viva Forever. The model mom styled her polished separates with a pair of black Manolo Blahnik pumps ($595), a dainty gold bracelet, and a metallic box clutch for a dash of sparkle. Re-create Victoria's London-perfect look by working her exact coat and shoes with a white shirt and slim black pants or score this rich Tibi coat ($431, original $717) to mimic this minimalistic style on a budget.

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.

Reese Witherspoon mixed high with low when she paired these 3.1 Phillip Lim colorblock pumps ($450) with a black tweed Zara blazer — which unfortunately is no longer available — while shopping in Beverly Hills. Her two-tone d'Orsay pumps added major flair to her daytime look, which also included a collarless white button-down and black denim. Reese then completed her outfit with her favorite Ray-Ban Wayfarers ($150), a black leather tote, and dazzling diamond studs. Score her exact pumps and shades to work with a black-on-black look for a day of shopping or glam them up with this flirty black ASOS mini ($44) for a night of dancing.

It's actress and model Byrdie Bell's job to look good in front of the cameras, and she didn't disappoint when she styled a yellow tweed Alice + Olivia miniskirt ($297) with a black leather jacket at the Alice + Olivia show Spring 2013 show at New York Fashion Week. Byrdie's white button-down blouse and suede nude Herve Leger pumps let her textured bottoms take the spotlight, while her tan Hermés tote injected major luxe. Show off your gams in Byrdie's exact tweed skirt all Fall by pairing it with tights or leggings and a cozy coat when the temperatures start to fall.

At the NYC screening for her new movie On the Road, Kristen Stewart struck a pose in a white Balenciaga button-down blouse, contrast-waist ALC trousers ($415), and strappy Jimmy Choo sandals. We especially love the way she worked her top: tucking it into her pants and leaving it open to reveal a satin charcoal tank. The actress accessorized with a silver open cuff, matching ring, and square gold pendant, then completed her screening style with smokey makeup and an effortless updo. Shop Kristen's exact trousers to pair with a white button-down and strappy black sandals for a menswear-inspired style or pair them with this white peplum Tibi blouse ($250) for a feminine twist.