2015's Biggest Style Star Just Might Surprise You

On a day you want to feel your best, stick to easy pieces that make you feel comfortable and confident.

Before Labor Day or after, all white makes for a standout street style look.

From her pencil skirt to her button-down and the sweater tied around her neck, Alexa's look proved that classic pieces can still feel cool when paired with the right accessories.

Alexa paired a slitted patent-leather skirt with a cozy sweater for the ultimate play on opposites.

The style star embraced the ultrasoft material when she dressed up in September.

A top or dress with a pussy bow at the collar is a look your grandma would approve of but you'll love too.

Alexa fully embraced the '70s look with this suede skirt and choker combo.

Add eye-catching detail to a fancy dress by cinching a belt or ribbon around the waist.

Skip the flapper dress and choose an unexpected spin on fringe like Alexa's knit dress.

Alexa turned heads at the Serpentine party in July when she wore a graphic Christopher Kane dress.

Show unexpected skin by trying a dress or top that shows off your shoulders.

Alexa donned a purple Erdem dress and blue flats at the Met Gala.

Alexa's ruffled gold dress is proof that no matter the occasion (or temperature), a princess moment is totally acceptable.

Opt for a pop of color when you're dressed in all black.

If it's chilly out, opt for an eye-catching jacket or bold scarf to stand out against the snowy backdrop.

For a high-low look, pair a fancy dress with your favorite kicks.

Whether it's an asymmetrical hemline or unusual cut at the shoulder, try something unexpected.

Alexa transformed a men's top into a dress by adding a contrasting belt.

Alexa's minidress was a modest twist on see-through dressing.

Alexa attended Stella McCartney's presentation in June wearing a printed top under a low-cut LBD.

It's the print we'll never be over.

If there's one coat that's absolutely worth the investment, it's the versatile camel coat.

Alexa's furry Gucci loafers added a masculine element to her feminine white dress.

Alexa added a girlie touch to her gray suit by wearing a sheer bodysuit underneath.

In October, Alexa blossomed in a floral Valentino gown.

Take a cue from Alexa, who paired a modest dress with edgy black boots to give it a downtown spin.

Alexa's stunning off-the-shoulder dress was designed to stand out.

The style star transformed an oversize blazer into a dress for the Balmain x H&M launch in October.

Alexa wore a slip dress for Vogue's pajama party in May.

Alexa's raincoat is proof that practical dressing can still be stylish.

Alexa's strappy spin on Mary Janes toned down the femininity of her lace dress.

Alexa's silver skirt made even a simple sweater feel fancy.

Dress up a mini by pairing it with sophisticated heels like a pair of pointed pumps.

Retire your dresses for the night, and give a jumpsuit a try instead.

Change up your look by pairing tights with your favorite Summer dress.

Consider it the topper that will work for any outfit.