Get a crash course in Hailey Bieber's signature style on the model's birthday.

It girl and fashion leader Hailey Bieber turns 27 today. In true Sagittarius fashion, Bieber's effortless style is always impressive. Whether&nbsp;stepping out to greet the streets of Manhattan or gracing the red carpet, the model and her stylist&nbsp;Maeve Riley have been at the pinnacle of street style and the &ldquo;model-off-duty&rdquo;&nbsp;aesthetic. The secret behind her always on-point wardrobe? Several key pieces that Bieber consistently sports, from oversize blazers to leather statement pieces.&nbsp;

All About the Blazer

Bieber's signature style&nbsp;wouldn&rsquo;t&nbsp;be complete without an impressive&nbsp;wardrobe of blazers.&nbsp;From classically sleek silhouettes to oversized pops of colors, there&nbsp;isn't&nbsp;a blazer we&nbsp;haven&rsquo;t&nbsp;loved on her.&nbsp;

Photo: Getty Images.

Instagram @stylememaeve

Leather, Leather, Leather

Whether daytime or a sexy night out, the model has been known to sport <a href="https://www.lofficielusa.com/fashion/how-to-wear-leather-trend-fall-2021" target="_blank" rel="noopener">leather</a> for every occasion.&nbsp;

Instagram @haileybstyle

Pops of Green

Green has quickly become the year's hottest hue and the model is well-versed in accessorizing with punchy pops. Many of the model's outfits are carefully created with unexpected green statements.

Instagram: @stylememaeve.

Floor-Length Coats

Bieber proves that floor length coats are appropriate for every occasion. Both leg bearing or bundled up for the winter, coats from Bottega Veneta, Saint Laurent,&nbsp;and&nbsp;Prada are seasonal staples of the model.&nbsp;

Instagram: @haileybstyle.

Sunnies for Every Occasion

Bieber's affinity for stylish sunglasses completes many of her looks including her strikingly simple Met Gala ensemble. In an interview with Vogue, Bieber even admits to sharing her favorite Saint Laurent sunglasses with her husband, Justin Bieber.

Hailey Bieber's 5 Wardrobe Staples

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